Isoxazole carboxamide compounds

ABSTRACT

The present disclosure provides substituted isoxazole carboxamide compounds having Formula (I) and the pharmaceutically acceptable salts and solvates thereof, wherein R 1 , R 2 , A, X, and Z are defined as set forth in the specification. The present disclosure is also directed to the use of compounds of Formula I to treat a disorder responsive to the blockade of SMYD proteins such as SMYD3 or SMYD2. Compounds of the present disclosure are especially useful for treating cancer.

BACKGROUND OF THE INVENTION

Field of the Invention

The present disclosure provides substituted isoxazole carboxamides as SMYD protein inhibitors, such as SMYD3 and SMYD2 inhibitors, and therapeutic methods of treating conditions and diseases wherein inhibition of SMYD proteins such as SMYD3 and SMYD2 provides a benefit.

Background

Epigenetic regulation of gene expression is an important biological determinant of protein production and cellular differentiation and plays a significant pathogenic role in a number of human diseases. Epigenetic regulation involves heritable modification of genetic material without changing its nucleotide sequence. Typically, epigenetic regulation is mediated by selective and reversible modification (e.g., methylation) of DNA and proteins (e.g., histones) that control the conformational transition between transcriptionally active and inactive states of chromatin. These covalent modifications can be controlled by enzymes such as methyltransferases (e.g., SMYD proteins such as SMYD3 and SMYD2), many of which are associated with genetic alterations that can cause human disease, such as proliferative disorders. Thus, there is a need for the development of small molecules that are capable of inhibiting the activity of SMYD proteins such as SMYD3 and SMYD2.

BRIEF SUMMARY OF THE INVENTION

In one aspect, the present disclosure provides substituted isoxazole carboxamide compounds represented by Formulae I-XVII below, and the pharmaceutically acceptable salts and solvates thereof, collectively referred to herein as “Compounds of the Disclosure.”

In another aspect, the present disclosure provides a Compound of the Disclosure and one or more pharmaceutically acceptable carriers.

In another aspect, the present disclosure provides a method of inhibiting SMYD proteins, such as SMYD3 or SMYD2, or both, in a mammal, comprising administering to the mammal an effective amount of at least one Compound of the Disclosure.

In another aspect, the present disclosure provides methods for treating a disease, disorder, or condition, e.g., cancer, responsive to inhibition of SMYD proteins, such as SMYD3 or SMYD2, or both, comprising administering a therapeutically effective amount of a Compound of the Disclosure.

In another aspect, the present disclosure provides the use of Compounds of the Disclosure as inhibitors of SMYD3.

In another aspect, the present disclosure provides the use of Compounds of the Disclosure as inhibitors of SMYD2.

In another aspect, the present disclosure provides the use of Compounds of the Disclosure as inhibitors of SMYD proteins.

In another aspect, the present disclosure provides a pharmaceutical composition for treating a disease, disorder, or condition responsive to inhibition of SMYD proteins, such as SMYD3 or SMYD2, or both, wherein the pharmaceutical composition comprises a therapeutically effective amount of a Compound of the Disclosure in a mixture with one or more pharmaceutically acceptable carriers.

In another aspect, the present disclosure provides Compounds of the Disclosure for use in treating cancer in a mammal, e.g., breast, cervical, colon, kidney, liver, head and neck, skin, pancreatic, ovary, esophageal, lung, and prostate cancer.

In another aspect, the present disclosure provides a Compound of the Disclosure for use in the manufacture of a medicament for treating cancer in a mammal.

In another aspect, the present disclosure provides kit comprising a Compound of the Disclosure.

Additional embodiments and advantages of the disclosure will be set forth, in part, in the description that follows, and will flow from the description, or can be learned by practice of the disclosure. The embodiments and advantages of the disclosure will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims.

It is to be understood that both the foregoing summary and the following detailed description are exemplary and explanatory only, and are not restrictive of the invention as claimed.

DETAILED DESCRIPTION OF THE INVENTION

One aspect of the present disclosure is based on the use of Compounds of the Disclosure as inhibitors of SMYD proteins. In view of this property, the Compounds of the Disclosure are useful for treating diseases, disorders, or conditions, e.g., cancer, responsive to inhibition of SMYD proteins.

One aspect of the present disclosure is based on the use of Compounds of the Disclosure as inhibitors of SMYD3. In view of this property, the Compounds of the Disclosure are useful for treating diseases, disorders, or conditions, e.g., cancer, responsive to inhibition of SMYD3.

One aspect of the present disclosure is based on the use of Compounds of the Disclosure as inhibitors of SMYD2. In view of this property, the Compounds of the Disclosure are useful for treating diseases, disorders, or conditions, e.g., cancer, responsive to inhibition of SMYD2.

In one embodiment, Compounds of the Disclosure are compounds having Formula I:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof wherein:

R¹ is selected from the group consisting of hydrogen, C₁₋₆ alkyl, C₁₋₄ alkenyl, C₁₋₄ haloalkyl, C₃₋₆ cycloalkyl, and hydroxyalkyl;

R² is selected from the group consisting of hydrogen, halo, and carboxamido;

A is selected from the group consisting of C₁₋₁₀ alkylenyl, (cycloalkylenyl)alkyl, optionally substituted C₃₋₁₂ cycloalkylenyl, optionally substituted C₆₋₁₄ arylenyl, optionally substituted 5- to 14-membered heteroarylenyl, optionally substituted 4- to 14-membered heterocyclenyl, and —C(H)R³R⁴;

with the provisos:

a) when R¹ is ethyl, n-propyl, isopropyl, isobutyl, or cyclopropyl; and R² is hydrogen, then A is not optionally substituted, optionally bridged piperidinenyl;

b) when R¹ is ethyl or cyclopropyl; R² is hydrogen; and X is —N(R⁷)S(═O)₂—, —N(R⁷)C(═O)—, or —N(R⁷)C(═O)C(R⁸)(H)—, then A is not optionally substituted 1,4-cyclohexylenyl;

c) when R¹ is ethyl or cyclopropyl; R² is hydrogen; X is absent; and Z is amino, alkylamino, dialkylamino, or heterocycloamino, then A is not optionally substituted 1,4-cyclohexylenyl; and

d) when R¹ is hydrogen, C₁₋₆ alkyl, or C₃₋₆ cycloalkyl; and R² is hydrogen, then A is not optionally substituted pyrrolidinenyl;

R³ is selected from the group consisting of hydrogen, C₁₋₆ alkyl, (hydroxy)(aryl)alkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, hydroxyalkyl, alkoxyalkyl, aryloxyalkyl, optionally substituted C₃₋₁₂ cycloalkyl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted C₆₋₁₄ aryl, aralkyl, alkoxycarbonyl, and —C(═O)N(R⁵)(R⁶);

R⁴ is selected from the group consisting of C₁₋₆ alkyl, hydroxyalkyl, optionally substituted C₃₋₁₂ cycloalkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 5- to 14-membered heteroaryl, optionally substituted 4- to 14-membered heterocyclo, and (heteroaryl)alkyl;

R⁵ is selected from the from the group consisting of hydrogen and C₁₋₄ alkyl;

R⁶ is selected from the group consisting of hydrogen, optionally substituted C₁₋₆ alkyl, fluoroalkyl, hydroxyalkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (cycloalkylamino)alkyl, (heterocyclo)alkyl, (cycloalkyl)alkyl, (amino)(carboxamido)alkyl, (amino)(hydroxy)alkyl, (amino)(aryl)alkyl, (amino)(heteroaryl)alkyl, (hydroxy)(aryl)alkyl, (aralkylamino)alkyl, (hydroxyalkylamino)alkyl, alkoxyalkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted 5- to 14-membered heteroaryl optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl;

X is selected from the group consisting of —S(═O)₂—, —S(═O)₂N(R⁷)—, —N(R⁷)S(═O)₂—, —S(═O)₂C(R⁸)(H)—, —C(═O)—, —C(═O)N(R⁷)—, —N(R⁷)C(═O)—, —C(═O)O—, —OC(═O)—, —C(═O)C(R⁸)(H)N(R⁷)—, —N(R⁷)C(═O)C(R⁸)(H)—, —C(R⁸)(H)C(═O)N(R⁷)—, —C(R⁸)(H)N(R⁷)C(═O)—, and —C(═O)C(R⁸)(H)—; or X is absent, i.e., Z forms a bond with A;

Z is selected from the group consisting of hydrogen, optionally substituted C₁₋₆ alkyl, fluoroalkyl, hydroxyalkyl, amino, alkylamino, dialkylamino, heterocycloamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (cycloalkylamino)alkyl, (heterocyclo)alkyl, (cycloalkyl)alkyl, (amino)(hydroxy)alkyl, (amino)(aryl)alkyl, (amino)(heteroaryl)alkyl (hydroxy)(aryl)alkyl, (aralkylamino)alkyl, (hydroxyalkylamino)alkyl, alkoxyalkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted 5- to 14-membered heteroaryl optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl;

wherein —X—Z is attached to any available carbon or nitrogen atom of A, R³, R⁴, or R⁶; e.g., when R⁴ is C₁₋₆ alkyl, e.g., ethyl, a hydrogen atom of that ethyl group is replaced with —X—Z to give —CH₂CH₂—X—Z or

or

when R⁴ is optionally substituted C₃₋₁₂ cycloalkyl, e.g., cyclohexyl, a hydrogen atom of the cyclohexyl group is replaced with —X—Z to give:

or

when R⁴ is optionally substituted 4- to 14-membered heterocyclo, e.g., piperidinyl, the hydrogen atom attached to the piperidinyl nitrogen atom is replaced with —X—Z to give:

or

when R⁴ is optionally substituted C₆₋₁₄ aryl, e.g., phenyl, a hydrogen atom on that phenyl group is replaced with —X—Z to give:

R⁷ is selected from the group consisting of hydrogen and C₁₋₄ alkyl; and

R⁸ is selected from the group consisting of hydrogen, C₁₋₄ alkyl, hydroxy, amino, alkylamino, dialkylamino, cycloalkylamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, and hydroxyalkyl.

In another embodiment, Compounds of the Disclosure are compounds having Formula I, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein A is C₁₋₁₀ alkylenyl.

In another embodiment, Compounds of the Disclosure are compounds having Formula II:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R^(9a) and R^(9b) are independently selected from the group consisting of hydrogen and C₁₋₄ alkyl;

R^(9c) and R^(9d) are independently selected from the group consisting of hydrogen and C₁₋₄ alkyl; or

R^(9c) and R^(9d) taken together with the carbon atom to which they are attached form a 3- to 6-membered cycloalkyl;

R^(9e) is selected from the group consisting of hydrogen and C₁₋₄ alkyl;

m is 0 or 1;

X is selected from the group consisting of —N(R⁷)C(═O)—, —N(R⁷)C(═O)C(R⁸)(H)—, and —N(R⁷)S(═O)₂—;

R⁸ is selected from the group consisting of C₁₋₄ alkyl, amino, alkylamino, and dialkylamino; and

Z is selected from the group consisting of C₁₋₆ alkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, optionally substituted 4- to 14-membered heterocyclo, and optionally substituted C₃₋₁₂ cycloalkyl, and R¹, R², and R⁷ are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula I, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein A is optionally substituted C₆₋₁₄ arylenyl.

In another embodiment, Compounds of the Disclosure are compounds having Formula III:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R^(10a) is selected from the group consisting of hydrogen, halo, C₁₋₆ alkyl, alkoxy, hydroxyalkyl, and alkoxycarbonyl;

X is selected from the group consisting of —C(═O)N(R⁷)—, —N(R⁷)C(═O)—, —C(═O)C(R⁸)(H)N(R⁷)—, —C(R⁸)(H)C(═O)N(R⁷)— and —S(═O)₂N(R⁷)—; or X is absent;

R⁸ is selected from the group consisting of C₁₋₄ alkyl, amino, alkylamino, and dialkylamino; and

Z is selected from the group consisting of hydrogen, amino, alkylamino, dialkylamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (amino)(heteroaryl)alkyl, heteroalkyl, (amino)(hydroxy)alkyl, (heterocyclo)alkyl, optionally substituted C₃₋₁₂ cycloalkyl, and optionally substituted 4- to 14-membered heterocyclo, and R¹, R², and R⁷ are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula IV:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R^(10a) is selected from the group consisting of hydrogen, halo, C₁₋₆ alkyl, alkoxy, hydroxyalkyl, and alkoxycarbonyl;

X is selected from the group consisting of —C(═O)N(R⁷)—, —N(R⁷)C(═O)—, —C(═O)C(R⁸)(H)N(R⁷)—, —C(R⁸)(H)C(═O)N(R⁷)— and —S(═O)₂N(R⁷)—; or X is absent;

R⁸ is selected from the group consisting of C₁₋₄ alkyl, amino, alkylamino, and dialkylamino; and

Z is selected from the group consisting of hydrogen, amino, alkylamino, dialkylamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (amino)(heteroaryl)alkyl, heteroalkyl, (amino)(hydroxy)alkyl, (heterocyclo)alkyl, optionally substituted C₃₋₁₂ cycloalkyl, and optionally substituted 4- to 14-membered heterocyclo, and R¹, R², and R⁷ are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula I, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein A is optionally substituted C₃₋₁₂ cycloalkylenyl.

In another embodiment, Compounds of the Disclosure are compounds having Formula V:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R^(10a) and R^(10b) are independently selected from the group consisting of hydrogen and C₁₋₄ alkyl;

X is selected from the group consisting of —S(═O)₂—, —S(═O)₂N(R⁷)—, —N(R⁷)C(═O)—, —C(═O)N(R⁷)—, —N(R⁷)S(═O)—, and —OC(═O)—; or X is absent;

Z is selected from the group consisting of amino, alkylamino, dialkylamino, heterocycloamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, and (hydroxyalkylamino)alkyl; n is 0 or 1; and p is 0 or 1, and R¹, R², and R⁷ are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula I, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein A is optionally substituted 4- to 14-membered heterocyclenyl.

In another embodiment, Compounds of the Disclosure are compounds having Formula VI:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R^(11a) and R^(11b) are each independently selected from the group consisting of hydrogen, C₁₋₄ alkyl, and alkoxycarbonyl;

X is selected from the group consisting of —C(═O)—, —S(═O)₂—, and —C(═O)C(R⁸)(H)—;

Z is selected from the group consisting of (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, optionally substituted C₃₋₁₂ cycloalkyl, and aralkyl; and

r is 0 or 1, and R¹, R², and R⁸ are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula XVI:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R^(11c) and R^(11d) are each independently selected from the group consisting of hydrogen and C₁₋₄ alkyl;

X is selected from the group consisting of —C(═O)— and —S(═O)₂; or X is absent; and

Z, R¹, and R² are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula XVI, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein R^(11c) and R^(11d) are hydrogen; X is absent; Z is selected from the group consisting of hydrogen, optionally substituted C₁₋₆ alkyl, fluoroalkyl, hydroxyalkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (heterocyclo)alkyl, (cycloalkyl)alkyl, (hydroxy)(aryl)alkyl, alkoxyalkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted 5- to 14-membered heteroaryl, optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl; R² is hydrogen; and R¹ is as defined above in connection with Formula I. In another embodiment, Z is selected from the group consisting of aralkyl, and (heteroaryl)alkyl. In another embodiment, Z is (heteroaryl)alkyl that is substituted with an aralkyl, e.g.,

or (heteroaryl)alkyl, e.g.,

In another embodiment, R¹ is selected from the group consisting of C₁₋₆ alkyl and C₃₋₆ cycloalkyl.

In another embodiment, Compounds of the Disclosure are compounds having Formula XVII:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R″ is selected from the group consisting of aralkyl and (heteroaryl)alkyl; and

R¹ is as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula XVII, wherein R¹ is selected from the group consisting of C₁₋₆ alkyl and C₃₋₆ cycloalkyl. In another embodiment, R″ is aralkyl. In another embodiment, R″ is (heteroaryl)alkyl. In another embodiment, R″ is benzyl wherein the phenyl group is optionally substituted with one or two substituents, e.g., —CH₂(4-Cl-Ph), —CH₂(3-Cl-Ph), —CH₂(3,4-di-Cl-Ph), and —CH₂(4-CF₃-Ph).

In another embodiment, Compounds of the Disclosure are compounds having Formula I, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein A is —C(H)R³R⁴. In another embodiment, R³ is selected from the group consisting of C₁₋₆ alkyl and optionally substituted C₃₋₁₂ cycloalkyl; and R⁴ is selected from the group consisting of optionally substituted C₃₋₁₂ cycloalkyl and optionally substituted C₆₋₁₄ aryl. In another embodiment, R⁴ is optionally substituted 4- to 14-membered heterocyclo. In another embodiment, R³ is C₁₋₄ alkyl, hydroxyalkyl, alkoxyalkyl, alkoxycarbonyl, optionally substituted C₆₋₁₄ aryl, and aralkyl. In each of these embodiments, —X—Z replaces a hydrogen atom on the R⁴ substituent. In certain instances, —X—Z can be hydrogen, when X is absent and Z is hydrogen.

In another embodiment, Compounds of the Disclosure are compounds having Formula VII, Formula VIII, or Formula IX:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R³ is selected from the group consisting of hydrogen, C₁₋₄ alkyl, hydroxyalkyl, alkoxyalkyl, optionally substituted C₆₋₁₄ aryl, aryloxyalkyl, and aralkyl;

X is selected from the group consisting of —S(═O)₂—, —S(═O)₂N(R⁷)—, —S(═O)₂C(R⁸)(H)—, —C(═O)—, —C(═O)N(R⁷)—, —C(═O)O—, —OC(═O)—, and —C(═O)C(R⁸)(H)—; or X is absent;

R⁸ is selected from the group consisting of C₁₋₄ alkyl, amino, alkylamino, and dialkylamino; and

Z is selected from the group consisting of C₁₋₆ alkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (heterocyclo)alkyl, hydroxyalkyl, optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl, and R¹, R², and R⁷ are as defined above in connection with Formula I. In another embodiment, R³ is selected from the group consisting of hydrogen and methyl.

In another embodiment, Compounds of the Disclosure are compounds having Formula X, Formula XI, or Formula XII:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein R¹² is selected from the group consisting of hydrogen, halo, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, hydroxyalkyl, (aralkyloxy)alkyl, alkoxyalkyl, heteroalkyl, (hydroxyalkylamino)alkyl, (heterocycloamino)alkyl, and carboxamido, and R¹, R², X, and Z are as defined above in connection with Formula I. In another embodiment, X is selected from the group consisting of —C(═O)N(R⁷)— and —S(═O)₂N(R⁷)—; Z is optionally substituted C₁₋₆ alkyl, hydroxyalkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (heterocyclo)alkyl, (cycloalkyl)alkyl, (amino)(hydroxy)alkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted 5- to 14-membered heteroaryl, optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl; and R¹² is hydrogen. In another embodiment, X is absent; Z is hydrogen; and R¹² is selected from the group consisting of halo, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, hydroxyalkyl, (aralkyloxy)alkyl, alkoxyalkyl, heteroalkyl, (hydroxyalkylamino)alkyl, (heterocycloamino)alkyl, and carboxamido.

In another embodiment, Compounds of the Disclosure are compounds having Formula XIII, Formula XIV, or Formula XV:

and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

R⁶ is selected from the group consisting of optionally substituted C₁₋₆ alkyl, hydroxyalkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (heterocyclo)alkyl, (cycloalkyl)alkyl, (amino)(hydroxy)alkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted 5- to 14-membered heteroaryl, optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl;

X is selected from the group consisting of —C(═O)N(R⁷)—, —C(═O)C(R⁸)(H)—, and —S(═O)₂N(R⁷)—; or X is absent;

R⁸ is selected from the group consisting of C₁₋₄ alkyl, amino, alkylamino, and dialkylamino;

Z is selected from the group consisting of C₁₋₄ alkyl, amino, alkylamino, dialkylamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (amino)(heteroaryl)alkyl, and (amino)(hydroxy)alkyl, and R¹, R², and R⁷ are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having Formula I, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein:

X is selected from the group consisting of:

and

R⁸ is selected from the group consisting of C₁₋₄ alkyl, amino, alkylamino, and dialkylamino, and R¹, R², A, and Z are as defined above in connection with Formula I.

In another embodiment, Compounds of the Disclosure are compounds having any one of Formulae I-XVII, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, wherein R¹ is selected from the group consisting of C₁₋₄ alkyl and C₃₋₆ cycloalkyl. In another embodiment, R¹ is cyclopropyl. In another embodiment, R² is hydrogen.

In another embodiment, a Compound of the Disclosure is not 5-cyclopropyl-N-(pyridin-3-yl)-1,2-oxazole-3-carboxamide.

In another embodiment, Compounds of the Disclosure are compounds of Table 1, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, or different pharmaceutically acceptable salt thereof. The chemical names of the compounds of Table 1 are provided in Table 1A.

In another embodiment, Compounds of the Disclosure are compounds of Table 1A, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof.

In another embodiment, Compounds of the Disclosure are compounds of Table 2, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, or different pharmaceutically acceptable salt thereof.

In another embodiment, Compounds of the Disclosure is the compound of Table 3, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof.

In another embodiment, Compounds of the Disclosure are compounds of Tables 1 and 2, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, or different pharmaceutically acceptable salt thereof.

In another embodiment, Compounds of the Disclosure are compounds of Tables 1-3, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, or different pharmaceutically acceptable salt thereof.

In another embodiment, Compounds of the Disclosure are compounds of Table 1, Table 1A, Table 2, and Table 3, and the pharmaceutically acceptable salts or solvates, e.g., hydrates, thereof, or different pharmaceutically acceptable salt thereof.

It should be appreciated that the Compounds of the Disclosure in certain embodiments are the free base, various salts, and hydrate forms, and are not limited to the particular salt listed in Table 1, Table 2, and Table 3.

TABLE 1 Cpd. Salt No. Structure Form  2

None  3

None  4

HCl  5

None  6

TFA  7

TFA  8

HCl  9

HCl  10

HCl  11

HCl  12

None  13

HCl  14

HCl  15

HCl  16

HCl  17

HCl  18

None  19

None  20

None  21

HCl  22

HCl  23

TFA  24

HCl  25

None  26

None  27

None  28

None  29

None  30

None  31

None  32

None  33

HCl  34

HCl  35

HCOOH  36

None  37

HCl  38

HCl  39

HCl  40

HCl  41

HCl  42

None  43

None  44

HCl  45

HCl  46

None  47

None  48

None  49

HCl  50

None  51

None  52

None  53

None  54

None  55

None  56

HCl  57

None  58

None  59

TFA  60

TFA  61

None  62

HCl  63

HCl  64

None  65

TFA  66

HCl  67

HCl  68

HCl  69

HCl  70

HCl  71

None  72

HCl  73

HCl  74

HCl  75

HCl  76

HCl  77

HCl  78

HCl  79

HCl  80

HCl  81

None  82

HCl  83

HCl  84

HCl  85

HCl  86

HCl  87

HCl  88

HCl  89

HCl  90

HCl  91

HCl  92

HCl  93

HCl  94

HCl  95

None  96

HCl  97

HCl  98

HCl  99

HCl 100

HCl 101

HCl 102

HCl 103

TFA 104

TFA 105

HCl 106

HCl 107

TFA 108

TFA 109

HCl 110

HCl 111

HCl 112

HCl 113

HCl 114

HCl 115

HCl 116

HCl 117

HCl 118

HCl 119

TFA 120

HCl 121

HCl 122

None 123

None 124

None 125

None 126

None 127

None 128

None 129

None 130

TFA 131

HCl 132

HCl 133

HCl 134

None 135

None 136

None 137

None 138

None 139

HCl 140

TFA 141

HCl 142

TFA 143

None 144

None 145

None 146

None 147

TFA 148

None 149

None 150

None 151

None 152

HCl 153

TFA 154

None 155

HCOOH 156

None 157

None 158

TFA 159

TFA 160

HCl 161

HCl 162

HCl 163

HCl 164

HCl 165

None 166

None 167

None 168

None 169

TFA 170

HCl 171

HCl 172

HCl 173

HCl 174

HCl 175

None 176

HCl 177

HCl 178

HCl 179

HCl 180

HCl 181

HCl 182

HCl 183

HCl 184

HCl 185

HCl 186

HCl 187

HCl 188

HCl 189

HCl 190

HCl 191

HCl 192

HCl 193

HCl 194

HCl 195

HCl 196

HCl 197

HCl 198

TFA 199

TFA 200

HCl 201

HCl 202

HCl 203

HCl 204

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TABLE 2 SMYD2 Biochem Cpd. Salt LCMS IC₅₀ No. Structure Form Chemical Name M + H (μM)* 400

None N-(1-acetylazetidin-3-yl)-5- cyclopropyl-1,2-oxazole-3- carboxamide 250.1 >50.0 401

None 5-cyclopropyl-N-[1-(2- methylpropyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 264.2 1.55823 402

None 5-cyclopropyl-N-[1-(2- fluoroethyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 254.1 7.78955 403

None 5-cyclopropyl-N-(1- methanesulfonylazetidin-3-yl)-1,2- oxazole-3-carboxamide 286.1 >50.0 404

None 5-cyclopropyl-N-[1-(2- hydroxyethyl)azetidin3--yl]-1,2- oxazole-3-carboxamide 252.2 4.67695 405

None 5-cyclopropyl-N-[1-(oxetan-3- yl)azetidin-3-yl]-1,2-oxazole-3- carboxamide 264.2 >50.0 406

None 5-cyclopropyl-N-[1-(2,2- difluoroethyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 272.2 >50.0 407

None 5-cyclopropyl-N-[1-(2- methoxyethyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 266.2 2.68352 408

None 5-cyclopropyl-N-[1-(2,2,2- trifluoroethyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 290.2 >50.0 409

None 5-cyclopropyl-N-(1,3- dimethylazetidin-3-yl)-1,2-oxazole-3- carboxamide 236.2 >50.0 410

None 5-cyclopropyl-N-[1-(propan-2- yl)azetidin-3-yl]-1,2-oxazole-3- carboxamide 250.1 1.04736 411

None 5-cyclopropyl-N-(1-methylazetidin- 3-yl)-1,2-oxazole-3-carboxamide 222.1 5.33712 412

None 5-cyclopropyl-N-(1-ethylazetidin-3- yl)-1,2-oxazole-3-carboxamide 236.2 1.50829 413

None 5-cyclopropyl-N-(1- cyclopropylazetidin-3-yl)-1,2- oxazole-3-carboxamide 248.1 1.46882 414

None 5-cyclopropyl-N-(1-propylazetidin-3- yl)-1,2-oxazole-3-carboxamide 250.2 1.70142 415

None N-(1-benzylazetidin-3-yl)-5- cyclopropyl-1,2-oxazole-3- carboxamide 298.1 2.47021 416

None 5-cyclopropyl-N-[1-(1- phenylpropyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 326.1 0.61999 417

None 5-cyclopropyl-N-[1-(2-hydroxy-1- phenylethyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 328.2 2.22554 418

None 5-cyclopropyl-N-[1-(1- phenylethyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 312.1 0.58861 419

None 5-cyclopropyl-N-[1-(2- phenylethyl)azetidin-3-yl]-1,2- oxazole-3-carboxamide 312.1 2.18872 420

HCl N-(azetidin-3-yl)-5-cyclopropyl-1,2- oxazole-3-carboxamide 208.1 421

None 5-cyclopropyl-N-(pyridin-3-yl)-1,2- oxazole-3-carboxamide 230.2 >50.0 422

None 5-cyclopropyl-N-(pyridin-4-yl)-1,2- oxazole-3-carboxamide 230.2 >50.0 423

None 5-cyclopropyl-N-{[1-(propan-2- yl)azetidin-3-yl]methyl}-1,2-oxazole- 3-carboxamide 264.1 >50.0 424

None 5-cyclopropyl-N-{[1- (cyclopropylmethyl)azetidin-3- yl]methyl}-1,2-oxazole-3- carboxamide 276.1 >50.0 425

None 5-cyclopropyl-N-[(1-propylazetidin- 3-yl)methyl]-1,2-oxazole-3- carboxamide 264.1 >50.0 426

None N-(azetidin-3-ylmethyl)-5- cyclopropyl-1,2-oxazole-3- carboxamide 222.1 33.04122 427

None (±)-cis-5-cyclopropyl-N-[5-methyl-1- (propan-2-yl)azepan-4-yl]-1,2- oxazole-3-carboxamide 306.2 >50.0 *IC₅₀ values are an average of n = 1 to n = 50

TABLE 3 SMYD2 Biochem Cpd. Salt LCMS IC₅₀ No. Structure Form Chemical Name M + H (μM)* 428

none N-(1-((1-(4-chlorobenzyl)-1H- pyrazol-4-yl)methyl)azetidin-3- yl)-5-cyclopropylisoxazole-3- carboxamide 412.2 0.0095 *IC₅₀ values are an average of n = 1 to n = 50

TABLE 1A SMYD3 Biochem SMYD3 Cpd. LCMS IC₅₀ cell IC₅₀ No. Chemical Name M + H (μM)* (μM)* 2 N-(1-((4- 447.15 48.11 acetamidophenyl)sulfonyl)piperidin-4- yl)-5-cyclobutylisoxazole-3-carboxamide 3 N-(4-((4- 431.91 23.37 acetamidophenyl)sulfonyl)cyclohexyl)-5- cyclopropylisoxazole-3-carboxamide 4 5-cyclopropyl-N-(piperidin-4- 250.05 31.8 ylmethyl)isoxazole-3-carboxamide 5 5-cyclopropyl-N-((1-methylpiperidin-4- 264.1 39.33 yl)methyl)isoxazole-3-carboxamide 6 N-((1s,3s)-3-((4- 419.25 32.91 acetamidophenyl)sulfonamido)cyclobutyl)- 5-cyclopropylisoxazole-3-carboxamide 7 N-((1r,3r)-3-((4- 419.3 46.75 acetamidophenyl)sulfonamido)cyclobutyl)- 5-cyclopropylisoxazole-3-carboxamide 8 N-((1r,4r)-4-aminocyclohexyl)-5- 375.83 20.73 cyclopropyl-4-iodoisoxazole-3- carboxamide 9 N-((1r,4r)-4-aminocyclohexyl)-5-(2- 254 33.25 hydroxyethyl)isoxazole-3-carboxamide 10 N3-((1r,4r)-4-aminocyclohexyl)-5- 349.1 38.97 cyclopropyl-N4-isobutylisoxazole-3,4- dicarboxamide 11 N-((1r,4r)-4-aminocyclohexyl)-5- 236.1 27.42 vinylisoxazole-3-carboxamide 12 5-cyclopropyl-N-(2,2-dimethyl-1- 299.05 12.75 phenylpropyl)isoxazole-3-carboxamide 13 N3-((1r,4r)-4-aminocyclohexyl)-5- 293.15 22.42 cyclopropylisoxazole-3,4-dicarboxamide 14 N-(4-(aminomethyl)phenyl)-5- 259.1 10.54 cyclopropylisoxazole-3-carboxamide 15 N-(1-(4-aminophenyl)ethyl)-5- 271.8 40.11 cyclopropylisoxazole-3-carboxamide 16 N-(4-(1-aminoethyl)phenyl)-5- 272.85 6.52 cyclopropylisoxazole-3-carboxamide 17 N-((1r,3r)-3-aminocyclobutyl)-5- 222.05 24.5 cyclopropylisoxazole-3-carboxamide 18 5-cyclopropyl-N-(1-(4-fluorophenyl)propyl)isoxazole- 289.1 41.22 3-carboxamide 19 5-cyclopropyl-N-(1-(4-fluorophenyl)-2- 303.05 16.38 methylpropyl)isoxazole-3-carboxamide 20 5-cyclopropyl-N-(1-(4-methoxyphenyl)- 329.1 5.85 2,2-dimethylpropyl)isoxazole-3- carboxamide 21 N-((1r,4r)-4-aminocyclohexyl)-5-(3- 268.1 40.64 hydroxypropyl)isoxazole-3-carboxamide 22 N-(azepan-4-yl)-5-cyclopropylisoxazole- 250.15 14.88 3- carboxamide 23 N-(3-(azetidin-3-ylamino)cyclobutyl)-5- 277.1 32.38 cyclopropylisoxazole-3-carboxamide 24 N-((1r,4r)-4-aminocyclohexyl)-5- 234.79 24.63 isopropylisoxazole-3-carboxamide (−NH₂) 25 5-cyclopropyl-N-(cyclopropyl(4- 301.05 16.21 fluorophenyl)methyl)isoxazole-3- carboxamide 26 5-cyclopropyl-N-(3,3-dimethylbutan-2- 237.05 45.92 yl)isoxazole- 3-carboxamide 27 N-(1-(4-aminophenyl)-2,2- 336.25 8.54 dimethylpropyl)-5-cyclopropylisoxazole- (+Na) 3-carboxamide 28 5-cyclopropyl-N-(2,2-dimethyl-1- 300.15 38.32 (pyridin-2-yl)propyl)isoxazole-3- carboxamide 29 5-cyclopropyl-N-(1-(4- 275 43.79 fluorophenyl)ethyl)isoxazole- 3-carboxamide 30 5-cyclopropyl-N-(2,2-dimethylpentan-3- 251.15 27.12 yl)isoxazole- 3-carboxamide 31 N-(1-(4-acetamidophenyl)-2,2- 356.25 12.82 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 32 N-(1-(4-chlorophenyl)-2,2- 333.15 9.03 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 33 N-(4-(aminomethyl)-2-methylphenyl)-5- 272.90 7.79 cyclopropylisoxazole-3-carboxamide 34 N-(4-(aminomethyl)-2-chlorophenyl)-5- 293.05 6.45 cyclopropylisoxazole-3-carboxamide (295.00) 35 N-((5-amino-1,3,3-trimethylcyclohexyl)methyl)- 306.3 12.99 5-cyclopropylisoxazole-3- carboxamide 36 5-cyclopropyl-N-(2,2-dimethyl-1-(p- 312.9 27.61 tolyl)propyl)isoxazole-3-carboxamide 37 N-(4-(2-aminoethyl)phenyl)-5- 272.15 7.25 cyclopropylisoxazole-3-carboxamide 38 N-(4-(1-aminopropyl)phenyl)-5- 286.96 4.43 cyclopropylisoxazole-3-carboxamide 39 N-(4-(1-amino-2,2- 297 2.52 dimethylpropyl)phenyl)-5- (−NH₃) cyclopropylisoxazole-3-carboxamide 40 N-(4-(aminomethyl)-2-iodophenyl)-5- 366.9 7.21 cyclopropylisoxazole-3-carboxamide (−NH₃) 41 N-(5-(aminomethyl)pyridin-2-yl)-5- 259.15 22.53 cyclopropylisoxazole-3-carboxamide 42 5-ethyl-N-(1-(3-methoxyphenyl)-2,2- 317.2 24.62 dimethylpropyl)isoxazole-3-carboxamide 43 5-cyclopropyl-N-(1-(3-methoxyphenyl)- 329.25 18.91 2,2-dimethylpropyl)isoxazole-3- carboxamide 44 N-(4-(1-amino-2-methylpropyl)phenyl)- 300.04 2.5 5-cyclopropylisoxazole-3-carboxamide 45 N-(5-(aminomethyl)-6-methylpyridin-2- 273.15 29.74 yl)-5-cyclopropylisoxazole-3- carboxamide 46 5-cyclopropyl-N-(2,2-dimethyl-1-(m- 313.25 22.2 tolyl)propyl)isoxazole-3-carboxamide 47 5-ethyl-N-(1-(3-fluorophenyl)-2,2- 305.15 7.26 dimethylpropyl)isoxazole-3-carboxamide 48 5-cyclopropyl-N-(1-(3-fluorophenyl)- 317.25 7.92 2,2-dimethylpropyl)isoxazole-3- carboxamide 49 5-cyclopropyl-N-(phenyl(piperidin-4- 326.25 8.09 yl)methyl)isoxazole-3-carboxamide 50 5-cyclopropyl-N-(2,2-dimethyl-1- 300.15 9.99 (pyridin-3-yl)propyl)isoxazole-3- carboxamide 51 5-cyclopropyl-N-(2,2-dimethyl-1- 300.2 4.08 (pyridin-4-yl)propyl)isoxazole-3- carboxamide 52 N-(1-cyclobutyl-2,2-dimethylpropyl)-5- 277.2 7.4 cyclopropylisoxazole-3-carboxamide 53 N-(1-cyclopentyl-2,2-dimethylpropyl)-5- 291.25 10.58 cyclopropylisoxazole-3-carboxamide 54 N-(1-cyclohexyl-2,2-dimethylpropyl)-5- 305.01 15.14 cyclopropylisoxazole-3-carboxamide 55 N-(cyclobutyl(phenyl)methyl)-5- 297.2 38.47 cyclopropylisoxazole-3-carboxamide 56 N-(4-(aminomethyl)-3-chlorophenyl)-5- 291.95 16.4 cyclopropylisoxazole-3-carboxamide 57 N-(1-(3-chlorophenyl)-2,2- 321.2 6.06 dimethylpropyl)-5-ethylisoxazole-3- carboxamide 58 N-(1-(3-chlorophenyl)-2,2- 333.2 9.97 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 59 N-(2-(4-amino-4- 306 10.23 methylcyclohexyl)propan- 2-yl)-5-cyclopropylisoxazole-3- carboxamide 60 N-(4-(2-aminopropan-2-yl)-1- 306 2.98 methylcyclohexyl)- 5-cyclopropylisoxazole-3-carboxamide 61 5-cyclopropyl-N-(2,2-dimethyl-1- 306.15 6.29 (thiazol-4-yl)propyl)isoxazole-3- carboxamide 62 5-cyclopropyl-N-(2,2-dimethyl-1- 306.25 4.35 (piperidin-4-yl)propyl)isoxazole-3- carboxamide 63 N-(((1r,4r)-4-aminocyclohexyl)(phenyl)methyl)- 340.25 6.99 5-cyclopropylisoxazole-3- carboxamide 64 5-ethyl-N-(phenyl(tetrahydro-2H-pyran- 337.25 37.06 4-yl)methyl)isoxazole-3-carboxamide (+Na) 65 N-(3-(aminomethyl)-3,5,5- 306.15 14.07 trimethylcyclohexyl)- 5-cyclopropylisoxazole-3-carboxamide 66 5-cyclopropyl-N-((S)-phenyl((S)- 312.2 34.2 pyrrolidin-2-yl)methyl)isoxazole-3- carboxamide 67 N-(((1s,4s)-4- 340.25 13 aminocyclohexyl)(phenyl)methyl)- 5-cyclopropylisoxazole-3-carboxamide 68 5-cyclopropyl-N-(2,2-dimethyl-1- 306.25 4.38 (piperidin-3-yl)propyl)isoxazole-3- carboxamide 69 5-cyclopropyl-N-(phenyl(piperidin-3- 326.25 12.68 yl)methyl)isoxazole-3-carboxamide 70 N-(4-(aminomethyl)-3-methylphenyl)-5- 272.97 8.22 cyclopropylisoxazole-3-carboxamide 71 5-ethyl-N-((1-methylpiperidin-4- 328.25 20.51 yl)(phenyl)methyl)isoxazole-3- carboxamide 72 N-((3-chlorophenyl)(piperidin-4- 348.2 1.4 yl)methyl)-5-ethylisoxazole-3- carboxamide 73 N-((3-chlorophenyl)(piperidin-4- 360.25 2.59 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 74 5-ethyl-N-(phenyl(piperidin-4-yl)methyl)isoxazole- 314.2 7.44 3-carboxamide 75 N-((3-((4- 493.3 13.58 chlorobenzyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)-5- cyclopropylisoxazole-3-carboxamide 76 N-((3- 465.35 34.82 ((cyclohexylmethyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)-5- cyclopropylisoxazole-3-carboxamide 77 N-((3-(cyclohexylcarbamoyl)phenyl)(piperidin- 451.4 49.05 4-yl)methyl)-5- cyclopropylisoxazole-3-carboxamide 78 N-(4-(aminomethyl)-3-methoxyphenyl)- 270.92 32.1 5-cyclopropylisoxazole-3-carboxamide (−NH₂) 79 5-cyclopropyl-N-((S)-1-(((S)-1,6- 368.25 15.03 diamino-1- oxohexan-2-yl)amino)-3-hydroxy-1- oxopropan-2-yl)isoxazole-3-carboxamide 80 N-((2-chlorophenyl)(piperidin-4- 348.15 15.86 yl)methyl)-5-ethylisoxazole-3- carboxamide 81 5-cyclopropyl-N-((1-methylpiperidin-4- 340.2 22.81 yl)(phenyl)methyl)isoxazole-3- carboxamide 82 N-((2-chlorophenyl)(piperidin-4- 360.2 9.05 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 83 5-cyclopropyl-N-(piperidin-4-yl(3- 460.3 30.8 ((pyridin-3- ylmethyl)carbamoyl)phenyl)methyl)isoxazole- 3-carboxamide 84 5-cyclopropyl-N-(piperidin-4-yl(3-((3- 480.4 10.57 (pyrrolidin-1- yl)propyl)carbamoyl)phenyl)methyl)isoxazole- 3-carboxamide 85 5-cyclopropyl-N-((3-((2-(piperidin-1- 480.4 12.59 yl)ethyl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 86 5-cyclopropyl-N-((3-((2- 475.35 20.84 (methylsulfonyl)ethyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 87 5-cyclopropyl-N-((3-((3- 454.35 24.56 (dimethylamino)propyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 88 5-cyclopropyl-N-(piperidin-4-yl(3- 460.35 37.32 ((pyridin-4- ylmethyl)carbamoyl)phenyl)methyl)isoxazole- 3-carboxamide 89 N-((3-(((1r,4r)-4- 466.35 39.36 aminocyclohexyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)-5- cyclopropylisoxazole-3-carboxamide 90 5-cyclopropyl-N-((3-((pent-4-yn-1- 11.77 yloxy)methyl)phenyl)(piperidin-4- yl)methyl)isoxazole- 3-carboxamide 91 N-(4-(aminomethyl)-2-isopropylphenyl)- 283.02 6.08 5-cyclopropylisoxazole-3-carboxamide (−NH2) 92 N-((1r,4r)-4-aminocyclohexyl)-5- 266.1 38.15 isobutylisoxazole-3-carboxamide 93 N-((1r,4r)-4-aminocyclohexyl)-5- 252.1 9.93 propylisoxazole-3-carboxamide 94 N-(4-(aminomethyl)-3-iodophenyl)-5- 383.98 19.48 cyclopropylisoxazole-3-carboxamide 95 N-(1-(2H-indazol-4-yl)-2,2- 339.01 6.82 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 96 5-cyclopropyl-N-((3-((1- 494.45 48.53 isopropylpiperidin-4- yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole- 3-carboxamide 97 5-cyclopropyl-N-((3-((3- 475.4 25.88 hydroxybenzyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 98 5-cyclopropyl-N-((3- 409.3 46.85 (cyclopropylcarbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3-carboxamide 99 5-cyclopropyl-N-(piperidin-4-yl(3- 394.24 11.9 ((prop-2-yn-1- yloxy)methyl)phenyl)methyl)isoxazole- 3-carboxamide 100 5-cyclopropyl-N-((3- 411.3 17.98 ((diethylamino)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3-carboxamide 101 N-(4-(aminomethyl)-2-ethylphenyl)-5- 268.99 3 cyclopropylisoxazole-3-carboxamide (−NH₂) 102 N-((1r,4r)-4-aminocyclohexyl)-5- 266.1 32.62 butylisoxazole-3-carboxamide 103 5-cyclopropyl-N-((3-((2-hydroxy-3- 496.4 14.1 (pyrrolidin-1- yl)propyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 104 5-cyclopropyl-N-((3-((3- 441.3 11.17 hydroxypropyl)(methyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 105 5-cyclopropyl-N-(piperidin-4-yl(3- 460.35 45.5 ((pyridin-2- ylmethyl)carbamoyl)phenyl)methyl)isoxazole- 3-carboxamide 106 5-cyclopropyl-N-(piperidin-4-yl(3- 446.3 4.76 (pyridin-3-ylcarbamoyl)phenyl)methyl)isoxazole- 3-carboxamide 107 5-cyclopropyl-N-((3-(((3- 464.35 16.78 fluorobenzyl)oxy)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 108 N-((3-((but-2-yn-1-yloxy)methyl)phenyl)(piperidin- 408.3 6.36 4-yl)methyl)-5- cyclopropylisoxazole-3-carboxamide 109 5-cyclopropyl-N-((3-(((3- 427.35 34.01 hydroxypropyl)(methyl)amino)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole- 3-carboxamide 110 5-cyclopropyl-N-((3-(((2- 572.3 4.98 iodobenzyl)oxy)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3-carboxamide 111 5-cyclopropyl-N-((3-((2- 490.4 11.35 methoxyphenethoxy)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 112 5-cyclopropyl-N-((3-((2- 474.4 11.25 methylphenethoxy)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 113 5-cyclopropyl-N-((3- 356.25 3.67 (hydroxymethyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 114 N-(4-(aminomethyl)-3-ethylphenyl)-5- 268.99 13.86 cyclopropylisoxazole-3-carboxamide (−NH₂) 115 5-cyclopropyl-N-((3-((3- 427.3 17.42 hydroxypropyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 116 5-cyclopropyl-N-((3-((2- 475.35 18.31 hydroxybenzyl)carbamoyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 117 5-cyclopropyl-N-(piperidin-4-yl(3- 446.4 9.3 (pyridin-2-ylcarbamoyl)phenyl)methyl)isoxazole- 3-carboxamide 118 5-cyclopropyl-N-((3-((2- 427.35 19.37 (ethylamino)ethoxy)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 119 N-((3-((2-aminoethoxy)methyl)phenyl)(piperidin- 399.3 13.19 4-yl)methyl)-5- cyclopropylisoxazole-3-carboxamide 120 5-cyclopropyl-N-(piperidin-4-yl(3- 398.35 20.62 (propoxymethyl)phenyl)methyl)isoxazole- 3-carboxamide 121 N-(4-(1-amino-4-hydroxybutyl)phenyl)- 316.10 4.36 5-cyclopropylisoxazole-3-carboxamide 122 5-cyclopropyl-N-(1- 305.1 11.83 oxaspiro[5.5]undecan-4-yl)isoxazole-3- carboxamide 123 5-cyclopropyl-N-(3- 319.3 4.79 ethoxyspiro[3.5]nonan-1-yl)isoxazole-3- carboxamide 124 5-cyclopropyl-N-(3- 305.1 26.51 oxaspiro[5.5]undecan-9-yl)isoxazole-3- carboxamide 125 N-(1-benzyl-6-methylpiperidin-3-yl)-5- 340.1 21.2 cyclopropylisoxazole-3-carboxamide 126 5-cyclopropyl-N-(3-phenylcyclopentyl)isoxazole- 297.1 29.97 3-carboxamide 127 5-cyclopropyl-N-(2-(3,4- 335.1 49.59 difluorophenyl)tetrahydrofuran-3-yl)isoxazole- 3-carboxamide 128 5-cyclopropyl-N-(2,2- 265.4 44.55 dimethyltetrahydro- 2H-pyran-4-yl)isoxazole-3-carboxamide 129 5-cyclopropyl-N-(6-oxaspiro[4.5]decan- 291.1 18.41 9-yl)isoxazole- 3-carboxamide 130 N-((3-((((1r,4r)-4- 1.38 aminocyclohexyl)oxy)methyl)phenyl)(piperidin- 4-yl)methyl)-5- cyclopropylisoxazole-3-carboxamide 131 5-cyclopropyl-N-((3- 16.6 ((isopropyl(tetrahydro- 2H-pyran-4-yl)amino)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 132 methyl 5-(aminomethyl)-2- 299.83 48.66 (5-cyclopropylisoxazole-3- (M − NH₂) carboxamido)benzoate 133 5-cyclopropyl-N-(piperidin-4-yl(3- 446.12 6.48 (pyridin-4- ylcarbamoyl)phenyl)methyl)isoxazole-3- carboxamide 134 N-(3-butoxy-2,2-dimethylcyclobutyl)-5- 307.3 18.73 cyclopropylisoxazole-3-carboxamide 135 5-cyclopropyl-N-(6-hydroxy-1,2,3,4- 299.1 23.68 tetrahydronaphthalen-2-yl)isoxazole-3- carboxamide 136 5-cyclopropyl-N-(3-isobutoxy-2,2- 307.2 9.54 dimethylcyclobutyl)isoxazole-3- carboxamide 137 5-cyclopropyl-N-(2-(4- 331.3 2.56 fluorophenyl)tetrahydro-2H-pyran-4- yl)isoxazole-3-carboxamide 138 N-(1-(1-benzylpyrrolidin-3-yl)ethyl)-5- 340.3 24.96 cyclopropylisoxazole-3-carboxamide 139 5-cyclopropyl-N-((3-(((2- 413.25 41.77 hydroxyethyl)(methyl)amino)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3- carboxamide 140 5-cyclopropyl-N-((3-((4-methyl-1H- 462.17 28.35 pyrrole-2- carboxamido)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3-carboxamide 141 5-cyclopropyl-N-((3-((3-(4-methyl-1H- 491.35 25.42 pyrazol-1- yl)propanamido)methyl)phenyl)(piperidin- 4-yl)methyl)isoxazole-3-carboxamide 142 N-((3-carbamoylphenyl)(piperidin-4- 369.15 3.6 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 143 N-((1r,4r)-4-aminocyclohexyl)-5- 260.1 18.56 (difluoromethyl)isoxazole-3- carboxamide 144 5-cyclopropyl-N-(2-isobutyltetrahydro- 293.2 7.16 2H-pyran-4-yl)isoxazole-3-carboxamide 145 N-(1-(1-cyclobutylpiperidin-3-yl)ethyl)- 318.4 18.08 5-cyclopropylisoxazole-3-carboxamide 146 5-cyclopropyl-N-(2-isopropyl-4,5,6,7- 315.1 27.28 tetrahydro-2H-indazol-6-yl)isoxazole-3- carboxamide 147 N-(4-(aminomethyl)-2- 310.15 4.07 (hydroxymethyl)phenyl)-5- (+Na) cyclopropylisoxazole-3-carboxamide 148 N-(4-(1-amino-3-(pyridin-2- 363.3 0.97 yl)propyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 149 N-(4-(1-amino-3-(pyridin-3- 363.3 0.62 yl)propyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 150 N-(4-(1-amino-3-(pyridin-4- 363.3 1.39 yl)propyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 151 N-(4-(1-amino-3-phenylpropyl)phenyl)- 345.12 2.34 5-cyclopropylisoxazole-3-carboxamide (M − NH₂) 152 5-cyclopropyl-N-((1-glycylpiperidin-4- 383.4 4.47 yl)(phenyl)methyl)isoxazole-3- carboxamide 153 N-((1-(D-alanyl)piperidin-4- 397.35 1.27 yl)(phenyl)methyl)-5- cyclopropylisoxazole-3-carboxamide 154 N-((1-(L-alanyl)piperidin-4- 397.35 1.53 yl)(phenyl)methyl)-5- cyclopropylisoxazole-3-carboxamide 155 5-cyclopropyl-N-((3- 445.4 4.15 (phenylcarbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 156 (±)-cis-5-cyclopropyl-N-(3- 275.4 31.11 cyclopropylcyclohexyl)isoxazole-3- carboxamide 157 (±)-trans-5-cyclopropyl-N-(3- 275.3 39.9 cyclopropylcyclohexyl)isoxazole-3- carboxamide 158 (±)-cis-5-cyclopropyl-N-(3-(1-methyl- 315.1 10.07 1H-imidazol-2-yl)cyclohexyl)isoxazole- 3-carboxamide 159 (±)-trans-5-cyclopropyl-N-((1S,3S)-3-(1- 315.1 14.94 methyl-1H-imidazol-2- yl)cyclohexyl)isoxazole-3-carboxamide 160 N-(4-(aminomethyl)-3-isopropylphenyl)- 322.2 17.14 5-cyclopropylisoxazole-3-carboxamide (+Na) 161 N-(4-(aminomethyl)-3- 310.2 12.36 (hydroxymethyl)phenyl)-5- (+Na) cyclopropylisoxazole-3-carboxamide 162 (R)-5-cyclopropyl-N-(piperidin-4-yl(3- 446.3 49 (pyridin-3- ylcarbamoyl)phenyl)methyl)isoxazole-3- carboxamide 163 (S)-5-cyclopropyl-N-(piperidin-4-yl(3- 446.3 0.85 (pyridin-3- ylcarbamoyl)phenyl)methyl)isoxazole-3- carboxamide 164 N-(4-((2- 337.1 17.78 aminoacetamido)methyl)phenyl)-5- (+Na) cyclopropylisoxazole-3-carboxamide 165 N-((1-benzyl-5-methylpyrrolidin-3- 340.2 43.84 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 166 N-((4-chlorophenyl)(4-methylmorpholin- 376.2 31.49 2-yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 167 5-cyclopropyl-N-(1,2-dimethylpiperidin- 263.1 28.85 3-yl)isoxazole-3-carboxamide 168 N-(1-benzylpiperidin-3-yl)-5- 326.1 26.38 cyclopropylisoxazole-3-carboxamide 169 5-cyclopropyl-N-((3-(oxetan-3- 425.3 35.06 ylcarbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 170 N-(4-(2-aminopropan-2-yl)phenyl)-5- 286.88 3.54 cyclopropylisoxazole-3-carboxamide 171 N-(4-(1-amino-2-((1-methylpiperidin-4- 398.25 24.39 yl)amino)-2-oxoethyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 172 5-cyclopropyl-N-((3-((6-methylpyridin- 460.3 5.9 3-yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 173 5-cyclopropyl-N-((3-(piperidin-3- 452.3 38.93 ylcarbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 174 N-((3-((5-carbamoylpyridin-3- 489.3 10.82 yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 175 5-cyclopropyl-N-(1-phenyl-3-(1H-1,2,4- 338.15 41.58 triazol-1-yl)propyl)isoxazole-3- carboxamide 176 5-cyclopropyl-N-((3-((6- 475.35 3.45 (methylamino)pyridin-3- yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 177 5-cyclopropyl-N-((3-((6- 476.35 4.59 methoxypyridin-3- yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 178 N-(1-(1-(L-alanyl)piperidin-4-yl)ethyl)- 335.25 0.47 5-cyclopropylisoxazole-3-carboxamide 179 N-((1-(L-alanyl)piperidin-4-yl)methyl)- 321.25 0.75 5-cyclopropylisoxazole-3-carboxamide 180 N-((1-(D-alanyl)piperidin-4-yl)methyl)- 321.2 9.05 5-cyclopropylisoxazole-3-carboxamide 181 5-cyclopropyl-N-(piperidin-4-yl(3- 447.35 7.34 (pyridazin-4- ylcarbamoyl)phenyl)methyl)isoxazole-3- carboxamide 182 5-cyclopropyl-N-(2-((2- 399.3 14.19 hydroxybenzyl)amino)-2-oxo-1- (pipendm-4-yl)ethyl)isoxazole-3- carboxamide 183 5-cyclopropyl-N-(piperidin-4-yl(3-((6- 514.35 8.28 (trifluoromethyl)pyridin-3- yl)carbamoyl)phenyl)methyl)isoxazole- 3-carboxamide 184 5-cyclopropyl-N-(piperidin-4-yl(3- 447.85 2.16 (pyrimidin-5- ylcarbamoyl)phenyl)methyl)isoxazole-3- carboxamide 185 5-cyclopropyl-N-(piperidin-4-yl(3- 447.4 1.7 (pyridazin-3- ylcarbamoyl)phenyl)methyl)isoxazole-3- carboxamide 186 5-cyclopropyl-N-((3-((2-hydroxypyridin- 462.35 29.68 3-yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 187 5-cyclopropyl-N-((3-((5-methylpyridin- 460.35 2.88 3-yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 188 N-(1-(1-(D-alanyl)piperidin-4-yl)ethyl)- 335.25 3.69 5-cyclopropylisoxazole-3-carboxamide 189 N-(1-(1-(L-tryptophyl)piperidin-4- 450.4 0.52 yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 190 N-(1-(1-(D-tryptophyl)piperidin-4- 450.4 10.09 yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 191 N-((1-(L-tryptophyl)piperidin-4- 436.35 0.56 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 192 N-((1-(D-tryptophyl)piperidin-4- 435.35 6.5 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 193 N-((1-(L-seryl)piperidin-4- 413.35 3.51 yl)(phenyl)methyl)-5- cyclopropylisoxazole-3-carboxamide 194 N-((1-(L-tyrosyl)piperidin-4- 489.5 2.69 yl)(phenyl)methyl)-5- cyclopropylisoxazole-3-carboxamide 195 N-((1-(L-tryptophyl)piperidin-4- 512.29 1.42 yl)(phenyl)methyl)-5- cyclopropylisoxazole-3-carboxamide 196 N-((1-(L-seryl)piperidin-4-yl)methyl)-5- 337.25 3.28 cyclopropylisoxazole-3-carboxamide 197 N-((1-(L-tyrosyl)piperidin-4-yl)methyl)- 413.35 0.43 5-cyclopropylisoxazole-3-carboxamide 198 (±)-trans-5-cyclopropyl-N-(4-(4- 319.2 17.68 fluorophenyl)-4-hydroxybutan-2- yl)isoxazole-3-carboxamide 199 ethyl 1-(L-tyrosyl)-5-(5- 471.4 43.3 cyclopropylisoxazole-3- carboxamido)piperidine-3-carboxylate 200 N-((3-((6-acetamidopyridin-3- 503.45 4.57 yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 201 5-cyclopropyl-N-(piperidin-4-yl(3- 447.3 18.97 (pyrazin-2- ylcarbamoyl)phenyl)methyl)isoxazole-3- carboxamide 202 5-cyclopropyl-N-((3-((6-hydroxypyridin- 462.35 49.68 3-yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 203 methyl 2-(1-(L-alanyl)piperidin-4-yl)-2- 379.3 0.74 (5-cyclopropylisoxazole-3- carboxamido)acetate 204 methyl 2-(1-(D-alanyl)piperidin-4-yl)-2- 379.3 7.54 (5-cyclopropylisoxazole-3- carboxamido)acetate 205 N-((1-(L-alanyl)piperidin-4-yl)(3- 517.35 0.29 (pyridin-3-ylcarbamoyl)phenyl)methyl)- 5-cyclopropylisoxazole-3-carboxamide 206 N-((1-(D-alanyl)piperidin-4-yl)(3- 517.45 0.59 (pyridin-3-ylcarbamoyl)phenyl)methyl)- 5-cyclopropylisoxazole-3-carboxamide 207 N-((1-(D-tryptophyl)piperidin-4- 534.5 23.23 yl)(phenyl)methyl)-5- (+Na) cyclopropylisoxazole-3-carboxamide 208 N-(1-(1-(L-valyl)piperidin-4-yl)ethyl)-5- 363.35 0.36 cyclopropylisoxazole-3-carboxamide 209 N-(1-(1-(D-valyl)piperidin-4-yl)ethyl)-5- 363.35 2.42 cyclopropylisoxazole-3-carboxamide 210 N-(1-(1-(L-seryl)piperidin-4-yl)ethyl)-5- 373.3 1.2 cyclopropylisoxazole-3-carboxamide (+Na) 211 N-(1-(1-(L-tyrosyl)piperidin-4-yl)ethyl)- 427.35 0.2 5-cyclopropylisoxazole-3-carboxamide 212 tert-butyl 4-(1-(5-cyclopropylisoxazole- 386.25 28.43 3-carboxamido)ethyl)piperidine-1- (+Na) carboxylate 213 5-cyclopropyl-N-(1-(piperidin-4- 264.2 7.12 yl)ethyl)isoxazole-3-carboxamide 214 5-cyclopropyl-N-(piperidin-4-yl(pyridin- 327.25 3.15 4-yl)methyl)isoxazole-3-carboxamide 215 N-((S)-(1-(L-alanyl)piperidin-4- 397.35 0.21 yl)(phenyl)methyl)-5- cyclopropylisoxazole-3-carboxamide 216 N-((R)-(1-(L-alanyl)piperidin-4- 397.35 4.48 yl)(phenyl)methyl)-5- cyclopropylisoxazole-3-carboxamide 218 5-cyclopropyl-N-(2-oxo-1-(piperidin-4- 370.3 26.87 yl)-2-(pyridin-3- ylamino)ethyl)isoxazole-3-carboxamide 219 5-cyclopropyl-N-(2-oxo-1-(piperidin-4- 384.3 34.17 yl)-2-((pyridin-3- ylmethyl)amino)ethyl)isoxazole-3- carboxamide 220 5-cyclopropyl-N-(piperidin-4-yl(3- 432.35 2.22 ((pyridin-3- ylamino)methyl)phenyl)methyl)isoxazole- 3-carboxamide 221 N-((3-((6-aminopyridin-3- 461.4 7.49 yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 222 5-cyclopropyl-N-((3-(methyl(pyridin-3- 460.4 31.99 yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 223 methyl 2-(1-(L-tryptophyl)piperidin-4- 494.18 3.15 yl)-2-(5-cyclopropylisoxazole-3- carboxamido)acetate 224 methyl 2-(1-(D-tryptophyl)piperidin-4- 494.23 29.42 yl)-2-(5-cyclopropylisoxazole-3- carboxamido)acetate 225 N-(1-(1-(D-seryl)piperidin-4-yl)ethyl)-5- 351.3 5.82 cyclopropylisoxazole-3-carboxamide 226 N-((1-(L-valyl)piperidin-4-yl)methyl)-5- 349.3 0.57 cyclopropylisoxazole-3-carboxamide 227 N-((1-(D-valyl)piperidin-4-yl)methyl)-5- 349.25 4.01 cyclopropylisoxazole-3-carboxamide 228 N-((1-(D-seryl)piperidin-4-yl)methyl)-5- 337.25 13.18 cyclopropylisoxazole-3-carboxamide 229 5-cyclopropyl-N-((3-((1-methyl-1H- 449.4 5.5 pyrazol-4- yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 230 N-(1-(1-(D-alanyl)piperidin-4- 349.3 1.93 yl)propyl)-5-cyclopropylisoxazole-3- carboxamide 231 N-(1-(1-(L-alanyl)piperidin-4-yl)propyl)- 349.25 0.9 5-cyclopropylisoxazole-3-carboxamide 232 5-cyclopropyl-N-(2-oxo-1-(piperidin-4- 370.2 6.36 yl)-2-(pyridin-2- ylamino)ethyl)isoxazole-3-carboxamide 233 N-((3-((4-aminopyridin-2- 461.3 5.1 yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 234 N-((3-((6-cyanopyridin-3- 471.4 5.42 yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 235 N-(1-(1-(D-tyrosyl)piperidin-4-yl)ethyl)- 427.3 6.5 5-cyclopropylisoxazole-3-carboxamide 236 N-((1-(D-tyrosyl)piperidin-4-yl)methyl)- 413.25 14.3 5-cyclopropylisoxazole-3-carboxamide 237 5-cyclopropyl-N-(1-(1-((S)-2- 336.2 25.65 hydroxypropanoyl)piperidin-4- yl)ethyl)isoxazole-3-carboxamide 238 (R)—N-(3-(3-aminobutanamido)-2,2- 323.1 4.43 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 239 (S)—N-(3-(3-aminobutanamido)-2,2- 323.1 6.35 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 240 N-(3-(3-aminopropanamido)-2,2- 309.1 12.72 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 241 N-(1-(1-(L-alanyl)piperidin-4-yl)-2-oxo- 455.3 15.58 2-((pyridin-3-ylmethyl)amino)ethyl)-5- cyclopropylisoxazole-3-carboxamide 242 N-(1-(1-(L-alanyl)piperidin-4-yl)-2-oxo- 455.25 22.31 2-((pyridin-4-ylmethyl)amino)ethyl)-5- cyclopropylisoxazole-3-carboxamide 243 N-(1-(1-(L-alanyl)piperidin-4-yl)-2-((2- 470.35 2.72 hydroxybenzyl)amino)-2-oxoethyl)-5- cyclopropylisoxazole-3-carboxamide 244 ethyl 2-(5-cyclopropylisoxazole-3- 322.2 20.57 carboxamido)-2-(piperidin-4-yl)acetate 245 N-((3-((2-aminopyridin-4- 461.3 4.13 yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 246 5-cyclopropyl-N-((3-((6- 489.4 5.95 (dimethylamino)pyridin-3- yl)carbamoyl)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 247 N-(1-(1-((R)-3-aminobutanoyl)piperidin- 349.25 0.62 4-yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 248 N-(1-(1-((S)-3-aminobutanoyl)piperidin- 349.25 1.47 4-yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 249 (S)—N-(4-(2-aminopropanamido)butyl)-5- 295.15 14.62 cyclopropylisoxazole-3-carboxamide 250 (R)—N-(4-(2-aminopropanamido)butyl)- 295.15 36.02 5-cyclopropylisoxazole-3-carboxamide 251 N-(((S)-1-(D-alanyl)pyrrolidin-3- 307.15 30.73 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 252 N-(((S)-1-(L-alanyl)pyrrolidin-3- 307.05 21.36 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 253 N-(((R)-1-(D-alanyl)pyrrolidin-3- 307.15 32.34 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 254 N-(4-aminobutyl)-5- 224.1 41.44 cyclopropylisoxazole-3-carboxamide 255 (R)-5-cyclopropyl-N-(pyrrolidin-3- 236.1 39.25 ylmethyl)isoxazole-3-carboxamide 256 (S)-5-cyclopropyl-N-(pyrrolidin-3- 236.1 37.48 ylmethyl)isoxazole-3-carboxamide 257 5-cyelopropyl-N-((3- 446.35 7.37 (nicotinamido)phenyl)(piperidin-4- yl)methyl)isoxazole-3-carboxamide 258 N-(1-(1-(L-alanyl)piperidin-4-yl)-2-oxo- 441.3 11.47 2-(pyridin-3-ylamino)ethyl)-5- cyclopropylisoxazole-3-carboxamide 259 N-(1-(1-(L-alanyl)piperidin-4-yl)-2-oxo- 455.3 11.04 2-((pyridin-2-ylmethyl)amino)ethyl)-5- cyclopropylisoxazole-3-carboxamide 260 N-(((R)-1-(L-alanyl)pyrrolidin-3- 307.15 15.5 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 261 N-(1-(1-(L-alanyl)piperidin-4-yl)-2-oxo- 441.3 0.39 2-(pyridin-2-ylamino)ethyl)-5- cyclopropylisoxazole-3-carboxamide 262 N-(1-(1-(L-alanyl)piperidin-4-yl)-2-oxo- 441.35 8.5 2-(pyridin-4-ylamino)ethyl)-5- cyclopropylisoxazole-3-carboxamide 263 5-cyclopropyl-N-((4-hydroxypiperidin-4- 266.15 14.89 yl)methyl)isoxazole-3-carboxamide 264 ethyl 4-((5-cyclopropylisoxazole-3- 322.1 43.56 carboxamido)methyl)piperidine-4- carboxylate 265 5-cyclopropyl-N-((4-methylpiperidin-4- 264.15 41.74 yl)methyl)isoxazole-3-carboxamide 266 5-cyclopropyl-N-((-fluoropiperidin-4- 268.05 18.82 yl)methyl)isoxazole-3-carboxamide 267 N-((1-(L-alanyl)-4-hydroxypiperidin-4- 337.35 5.47 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 268 ethyl 1-(L-alanyl)-4-((5- 393.15 3.22 cyclopropylisoxazole-3- carboxamido)methyl)piperidine-4- carboxylate 269 N-((1-(L-alanyl)-4-methylpiperidin-4- 335.15 1.67 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 270 N-((1-(L-alanyl)-4-fluoropiperidin-4- 339.15 4.15 yl)methyl)-5-cyclopropylisoxazole-3- carboxamide 271 N-(1-(1-(L-alanyl)piperidin-4-yl)-2- 351.3 2.23 hydroxyethyl)-5-cyclopropylisoxazole-3- carboxamide 272 ethyl 2-(1-(L-tyrosyl)piperidin-4-yl)-2- 485.3 7.39 (5-cyclopropylisoxazole-3- carboxamido)acetate 273 N-(1-(1-(L-tyrosyl)piperidin-4-yl)-2- 465.25 2.37 hydroxyethyl)-5-cyclopropylisoxazole-3- (+Na) carboxamide 274 5-cyclopropyl-N-(2-hydroxy-1- 280.1 5.93 (piperidin-4-yl)ethyl)isoxazole-3- carboxamide 275 N-(6-(3- 333.2 1.8 aminopropanamido)spiro[3.3]heptan-2- yl)-5-cyclopropylisoxazole-3- carboxamide [trans isomer] 276 5-cyclopropyl-N-(2-methoxy-1- 294.1 11.92 (piperidin-4-yl)ethyl)isoxazole-3- carboxamide 277 5-cyclopropyl-N-(2-phenoxy-1- 356.1 10.51 (piperidin-4-yl)ethyl)isoxazole-3- carboxamide 278 5-cyclopropyl-N-(2-isopropoxy-1- 322.2 15.25 (piperidin-4-yl)ethyl)isoxazole-3- carboxamide 279 N-(6-((R)-3- 347.5 1.25 aminobutanamido)spiro[3.3]heptan-2- yl)-5-cyclopropylisoxazole-3- carboxamide [trans isomer] 280 N-((1r,4r)-4-aminocyclohexyl)-5- 224.2 18.75 methylisoxazole-3-carboxamide 281 N-(6-((R)-3- 347.1 5.6 aminobutanamido)spiro[3.3]heptan-2- yl)-5-cyclopropylisoxazole-3- carboxamide [cis isomer] 282 N-(1-(1-(L-alanyl)piperidin-4-yl)-2- 387 2.08 methoxyethyl)-5-cyclopropylisoxazole- (+Na) 3-carboxamide 283 N-(1-(1-(L-alanyl)piperidin-4-yl)-2- 427.35 2.67 phenoxyethyl)-5-cyclopropylisoxazole-3- carboxamide 284 N-(1-(1-(L-alanyl)piperidin-4-yl)-2- 393.35 1.19 isopropoxyethyl)-5- cyclopropylisoxazole-3-carboxamide 285 N-(1-(1-(L-tyrosyl)piperidin-4-yl)-2- 457.25 1.07 methoxyethyl)-5-cyclopropylisoxazole- 3-carboxamide 286 N-(1-(1-(L-tyrosyl)piperidin-4-yl)-2- 519.3 4.35 phenoxyethyl)-5-cyclopropylisoxazole-3- carboxamide 287 N-(1-(1-(L-tyrosyl)piperidin-4-yl)-2- 485.3 5.2 isopropoxyethyl)-5- cyclopropylisoxazole-3-carboxamide 288 N-(6-((S)-3- 347.58 3.94 aminobutanamido)spiro[3.3]heptan-2- yl)-5-cyclopropylisoxazole-3- carboxamide [trans isomer] 290 N-(6-((S)-3- 347.6 1.82 aminobutanamido)spiro[3.3]heptan-2- yl)-5-cyclopropylisoxazole-3- carboxamide[cis isomer] 291 N-(1-(3-aminopropanoyl)piperidin-3-yl)- 307 25.86 5-cyclopropylisoxazole-3-carboxamide 292 5-cyclopropyl-N-((1r,4r)-4-((2-((2- 365.1 4.88 hydroxyethyl)amino)ethyl)carbamoyl)cyclohexyl)isoxazole- 3-carboxamide 293 N-(6-((R)-3- 375.4 0.56 aminobutanamido)bicyclo[3.3.1]nonan- 2-yl)-5-cyclopropylisoxazole-3- carboxamide 294 N-(6-((S)-3- 375.3 0.66 aminobutanamido)bicyclo[3.3.1]nonan- 2-yl)-5-cyclopropylisoxazole-3- carboxamide 295 N-(6-(3- 361.4 1.2 aminopropanamido)bicyclo[3.3.1]nonan- 2-yl)-5-cyclopropylisoxazole-3- carboxamide 296 5-cyclopropyl-N-((1-oxo-2-(pyridin-3- 472.63 36.37 yl)-1,2,3,4-tetrahydroisoquinolin-5- yl)(piperidin-4-yl)methyl)isoxazole-3- carboxamide 297 N-(1-(4-aminobutanoyl)piperidin-3-yl)- 321.05 18.59 5-cyclopropylisoxazole-3-carboxamide 298 N-(1-(1-(3-aminopropanoyl)piperidin-3- 335.1 37.71 yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 299 5-cyclopropyl-N-(1-(1-glycylpiperidin-3- 321.1 21.81 yl)ethyl)isoxazole-3-carboxamide 300 5-cyclopropyl-N-(1-(piperidin-4- 292.1 8.7 yl)butyl)isoxazole-3-carboxamide 301 5-cyclopropyl-N-(2-phenyl-1-(piperidin- 340.1 36.88 4-yl)ethyl)isoxazole-3-carboxamide 302 N-(1-(((1r,4r)-4-(2- 378.1 27.66 aminoacetamido)cyclohexyl)amino)-1- oxopropan-2-yl)-5-cyclopropylisoxazole- 3-carboxamide 303 5-cyclopropyl-N-(1-glycylpiperidin-3- 293.1 32.81 yl)isoxazole-3-carboxamide 304 N-(1-(1-(4-aminobutanoyl)piperidin-3- 349.1 21.81 yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 305 5-cyclopropyl-N-(3-methyl-1-(piperidin- 306.15 9.24 4-yl)butyl)isoxazole-3-carboxamide 306 N-(3-(3-aminopropanamido)-2- 295.1 41.9 methylpropyl)-5-cyclopropylisoxazole-3- carboxamide 307 N-(1-(3-aminopropanamido)pentan-3- 309.1 21.73 yl)-5-cyclopropylisoxazole-3- carboxamide 308 N-(4-(3-aminopropanamido)-2- 309.1 22.05 methylbutan-2-yl)-5- cyclopropylisoxazole-3-carboxamide 309 (1r,4r)-4-(5-cyclopropylisoxazole-3- 322.1 0.71 carboxamido)cyclohexyl 3- aminopropanoate 310 N-(3-(4-aminobutanamido)cyclohexyl)- 335.1 27.03 5-cyclopropylisoxazole-3-carboxamide 311 (R)—N-((1-((3- 335.05 10.15 aminobutanamido)methyl)cyclobutyl)methyl)- 5-cyclopropylisoxazole-3- carboxamide 312 N-((1r,4r)-4-((3- 335.1 2.75 aminopropyl)carbamoyl)cyclohexyl)-5- cyclopropylisoxazole-3-carboxamide 313 N-(4-((R)-3-aminobutanamido)-3,3- 337.1 0.8 dimethylbutan-2-yl)-5- cyclopropylisoxazole-3-carboxamide 314 N-(4-(3-aminopropanamido)butan-2-yl)- 295.05 27.98 5-cyclopropylisoxazole-3-carboxamide 315 N-(3-(3-aminopropanamido)cyclohexyl)- 321.1 20.78 5-cyclopropylisoxazole-3-carboxamide 316 N-((1r,4r)-4-(3- 295.1 8.58 aminopropanamido)cyclohexyl)-5- methylisoxazole-3-carboxamide 317 N-((1r,4r)-4-((2- 321.1 3.67 aminoethyl)carbamoyl)cyclohexyl)-5- cyclopropylisoxazole-3-carboxamide 318 N-(4-((S)-3-aminobutanamido)-3,3- 337.1 2.03 dimethylbutan-2-yl)-5- cyclopropylisoxazole-3-carboxamide 319 N-(1-((1r,4r)-4-aminocyclohexane-1- 335.1 1.83 carboxamido)propan-2-yl)-5- cyclopropylisoxazole-3-carboxamide 320 N-(1-(4-aminobutanamido)propan-2-yl)- 295.1 12.94 5-cyclopropylisoxazole-3-carboxamide 321 5-cyclopropyl-N-(1-(piperidin-3- 264 26.78 yl)ethyl)isoxazole-3-carboxamide 322 N-(1-(4-aminobutanamido)butan-2-yl)-5- 309.1 17.38 cyclopropylisoxazole-3-carboxamide 323 N-(1-((1r,4r)-4-aminocyclohexane-1- 349.1 1.3 carboxamido)butan-2-yl)-5- cyclopropylisoxazole-3-carboxamide 324 N-(1-(3-aminopropanamido)butan-2-yl)- 295.1 19.68 5-cyclopropylisoxazole-3-carboxamide 325 N-(4-(3-aminopropanamido)phenyl)-5- 315 1.06 cyclopropylisoxazole-3-carboxamide 326 N-(4-(2-aminoacetamido)phenyl)-5- 301.3 4.24 cyclopropylisoxazole-3-carboxamide 327 N-(4-(4-aminobutanamido)phenyl)-5- 329.05 1.19 cyclopropylisoxazole-3-carboxamide 328 N-(4-((3-aminopropyl)amino)phenyl)-5- 301.05 3.74 cyclopropylisoxazole-3-carboxamide 329 N-(4-((2-aminoethyl)amino)phenyl)-5- 287.05 4.69 cyclopropylisoxazole-3-carboxamide 330 N-((1-((3- 307.1 37.55 aminopropanamido)methyl)cyclopropyl)methyl)- 5-cyclopropylisoxazole-3- carboxamide 331 N-(4-(3-aminopropanamido)-1- 311.1 13.31 hydroxybutan-2-yl)-5- cyclopropylisoxazole-3-carboxamide 332 5-cyclopropyl-N-(4-(piperidin-4- 355.1 1.37 ylcarbamoyl)phenyl)isoxazole-3- carboxamide 333 N-(4-(((1s,4s)-4- 369.1 8.34 aminocyclohexyl)carbamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 334 N-(4-(((1r,4r)-4- 369.1 3.83 aminocyclohexyl)carbamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 335 N-(3-(N-(2- 351 10 aminoethyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 336 N-(4-(N-(3- 365.1 5.89 aminopropyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 337 N-(3-((2-aminoethyl)carbamoyl)phenyl)- 315 >10 5-cyclopropylisoxazole-3-carboxamide 338 N-(3-(N-(3- 365.1 >10 aminopropyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 339 N-(4-(N-(2- 351.1 7.68 aminoethyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 340 (R)—N-(1-(1-(4-aminobutanoyl)piperidin- 349.15 1.29 4-yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 341 (S)—N-(1-(1-(4-aminobutanoyl)piperidin- 349.15 3.54 4-yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 342 N-(1-((R)-3-aminobutanamido)-2,2- 351.2 1.31 dimethylpentan-3-yl)-5- cyclopropylisoxazole-3-carboxamide 343 N-(1-((3-aminopropyl)sulfonyl)azetidin- 329 >10 >40 3-yl)-5-cyclopropylisoxazole-3- carboxamide 344 (R)—N-(1-(1-((3- 385 5.03 23.42 aminopropyl)sulfonyl)piperidin-4- yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 345 (S)—N-(1-(1-((3- 385 >10 >40 aminopropyl)sulfonyl)piperidin-4- yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 346 (S)-5-cyclopropyl-N-(1-(1-(2-(piperidin- 389.1 >10 4-yl)acetyl)piperidin-4- yl)ethyl)isoxazole-3-carboxamide 347 (R)-5-cyclopropyl-N-(1-(1-(2-(piperidin- 389.2 2.6 4-yl)acetyl)piperidin-4- yl)ethyl)isoxazole-3-carboxamide 348 N-((R)-1-(1-((1r,4R)-4- 389.2 0.46 5.16 aminocyclohexane-1-carbonyl)piperidin- 4-yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 349 N-((S)-1-(1-((1r,4S)-4- 389.2 2.79 >40 aminocyclohexane-1-carbonyl)piperidin- 4-yl)ethyl)-5-cyclopropylisoxazole-3- carboxamide 350 N-(1-((1r,4r)-4-aminocyclohexane-1- 333 >10 >40 carbonyl)azetidin-3-yl)-5- cyclopropylisoxazole-3-carboxamide 351 N-(3-((3- 329.1 >10 >40 aminopropyl)carbamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 352 N-(1-(4-aminobutanoyl)azetidin-3-yl)-5- 293.05 >10 cyclopropylisoxazole-3-carboxamide 353 N-(3-bromo-4-(piperidin-4- 433.1/ 1.44 ylcarbamoyl)phenyl)-5- (433) cyclopropylisoxazole-3-carboxamide 354 5-cyclopropyl-N-(2-methyl-4-(piperidin- 369.2 2.17 4-ylcarbamoyl)phenyl)isoxazole-3- carboxamide 355 N-(4-((3-aminopropyl)carbamoyl)-3- 407.05/ 1.77 bromophenyl)-5-cyclopropylisoxazole-3- (409) carboxamide 356 N-(4-((3-aminopropyl)carbamoyl)-2- 343.1 3.52 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 357 N-(3-bromo-4-((piperidin-4- 447.1/ 7.25 ylmethyl)carbamoyl)phenyl)-5- (449) cyclopropylisoxazole-3-carboxamide 358 N-(4-((3-aminocyclobutyl)carbamoyl)-3- 419/ 1.4 bromophenyl)-5-cyclopropylisoxazole-3- (421.05) carboxamide 359 5-cyclopropyl-N-(4-(N-(piperidin-4- 405 5.81 >40 ylmethyl)sulfamoyl)phenyl)isoxazole-3- carboxamide 360 5-cyclopropyl-N-(3-methyl-4-(piperidin- 369.15 1.41 4-ylcarbamoyl)phenyl)isoxazole-3- carboxamide 361 N-(2-bromo-4-(piperidin-4- 433 1.77 >40 ylcarbamoyl)phenyl)-5- (435) cyclopropylisoxazole-3-carboxamide 362 N-(4-((4-aminocyclohexyl)carbamoyl)-3- 383.4 3.74 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 363 N-(4((4-aminocyclohexyl)carbamoyl)-2- 447/ 5.59 >40 bromophenyl)-5-cyclopropylisoxazole-3- (449.0) carboxamide 364 N-(4-((2-aminoethyl)carbamoyl)-3- 329.1 6 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 365 N-(4((2-aminoethyl)carbamoyl)-3- 393.05/ 4.5 >40 bromophenyl)-5-cyclopropylisoxazole-3- (395) carboxamide 366 N-(4-((2-aminoethyl)carbamoyl)-2- 393/ 3.7 38.81 bromophenyl)-5-cyclopropylisoxazole-3- (395.1) carboxamide 367 N-(4-((3-aminopropyl)carbamoyl)-3- 343.1 5.23 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 368 N-(3-bromo-4-(pyrrolidin-3- 419.1/ 3.06 >40 ylcarbamoyl)phenyl)-5- (421) cyclopropylisoxazole-3-carboxamide 369 5-cyclopropyl-N-(2-methyl-4- 383.1 8.43 ((piperidin-4- ylmethyl)carbamoyl)phenyl)isoxazole-3- carboxamide 370 N-(4-((3-aminocyclobutyl)carbamoyl)-2- 419.1/ 2.74 >40 bromophenyl)-5-cyclopropylisoxazole-3- (421) carboxamide 371 N-(4-((3-aminocyclohexyl)carbamoyl)-3- 447/ 9.11 bromophenyl)-5-cyclopropylisoxazole-3- (449.15) carboxamide 372 N-(4-(N-(4- 405 2.57 21.71 aminocyclohexyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 373 5-cyclopropyl-N-(4-(N-(piperidin-4- 391 6.04 39.07 yl)sulfamoyl)phenyl)isoxazole-3- carboxamide 374 5-cyclopropyl-N-(4-(N-(pyrrolidin-3- 377.2 4.03 >40 yl)sulfamoyl)phenyl)isoxazole-3- carboxamide 375 N-(4-(N-(3- 377 4.72 >40 aminocyclobutyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 376 N-(1-((S)-3-aminobutanamido)-2,2- 351.1 1.17 dimethylpentan-3-yl)-5- cyclopropylisoxazole-3-carboxamide 377 N-(4-((4-aminocyclohexyl)carbamoyl)-3- 447.3/ 2.81 bromophenyl)-5-cyclopropylisoxazole-3- (449) carboxamide 378 N-(4-((4-aminocyclohexyl)carbamoyl)-2- 383.3 6.36 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 379 N-(4-((2-aminoethyl)carbamoyl)-2- 329 2.76 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 380 N-(4-((3-aminopropyl)carbamoyl)-2- 406.9/ 1.74 bromophenyl)-5-cyclopropylisoxazole-3- (409) carboxamide 381 5-cyclopropyl-N-(2-methyl-4- 355 2 (pyrrolidin-3- ylcarbamoyl)phenyl)isoxazole-3- carboxamide 382 N-(2-bromo-4-(pyrrolidin-3- 419/ 2.95 ylcarbamoyl)phenyl)-5- (420.9) cyclopropylisoxazole-3-carboxamide 383 N-(4-((3-aminocyclopentyl)carbamoyl)- 433.1/ 3.23 3-bromophenyl)-5-cyclopropylisoxazole- (435) 3-carboxamide 384 N-(4-((3-aminocyclopentyl)carbamoyl)- 369.15 5.54 2-methylphenyl)-5- cyclopropylisoxazole-3-carboxamide 385 N-(4-((3-aminocyclopentyl)carbamoyl)- 433.15/ 3.29 2-bromophenyl)-5-cyclopropylisoxazole- (435) 3-carboxamide 386 N-(4-((3-aminocyclohexyl)carbamoyl)-2- 383.1 8.02 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 387 N-(4-((3-aminocyclohexyl)carbamoyl)-2- 447/ 5.37 bromophenyl)-5-cyclopropylisoxazole-3- (449.0) carboxamide 388 N-(4-(N-(3- 391 5.11 >40 aminocyclopentyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 389 N-(4-(N-(3- 405.15 3.79 38.09 aminocyclohexyl)sulfamoyl)phenyl)-5- cyclopropylisoxazole-3-carboxamide 390 5-cyclopropyl-N-(3-methyl-4- 355.1 4.45 (pyrrolidin-3- ylcarbamoyl)phenyl)isoxazole-3- carboxamide 391 5-cyclopropyl-N-(3-methyl-4- 383.1 >10 ((piperidin-4- ylmethyl)carbamoyl)phenyl)isoxazole-3- carboxamide 392 N-(2-bromo-4-((piperidin-4- 447/ 4.78 ylmethyl)carbamoyl)phenyl)-5- (449.0) cyclopropylisoxazole-3-carboxamide 393 N-(4-((3-aminocyclohexyl)carbamoyl)-3- 383.1 >10 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 394 N-((1s,4s)-4-(N-(2- 357 2.12 aminoethyl)sulfamoyl)cyclohexyl)-5- cyclopropylisoxazole-3-carboxamide 395 N-(4-((3-aminocyclopentyl)carbamoyl)- 369 4.61 3-methylphenyl)-5- cyclopropylisoxazole-3-carboxamide 396 N-(4-((3-aminocyclobutyl)carbamoyl)-2- 355.2 3.29 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide 397 N-(3-((3-aminopropyl)sulfonamido)-2,2- 359.1 2.16 dimethylpropyl)-5-cyclopropylisoxazole- 3-carboxamide 398 5-cyclopropyl-N-(2,2-dimethyl-3- 385.15 1.74 (piperidine-4- sulfonamido)propyl)isoxazole-3- carboxamide 399 N-(4-((3-aminocyclobutyl)carbamoyl)-3- 355 4.56 methylphenyl)-5-cyclopropylisoxazole- 3-carboxamide *IC₅₀ values are an average of n = 1 to n = 50

Definitions

For the purpose of the present disclosure, the term “alkyl” as used by itself or as part of another group refers to a straight- or branched-chain aliphatic hydrocarbon containing one to twelve carbon atoms (i.e., C₁₋₁₂ alkyl) or the number of carbon atoms designated (i.e., a C₁ alkyl such as methyl, a C₂ alkyl such as ethyl, a C₃ alkyl such as propyl or isopropyl, etc.). In one embodiment, the alkyl group is chosen from a straight chain C₁₋₁₀ alkyl group. In another embodiment, the alkyl group is chosen from a branched chain C₃₋₁₀ alkyl group. In another embodiment, the alkyl group is chosen from a straight chain C₁₋₆ alkyl group. In another embodiment, the alkyl group is chosen from a branched chain C₃₋₆ alkyl group. In another embodiment, the alkyl group is chosen from a straight chain C₁₋₄ alkyl group. In another embodiment, the alkyl group is chosen from a branched chain C₃₋₄ alkyl group. In another embodiment, the alkyl group is chosen from a straight or branched chain C₃₋₄ alkyl group. In another embodiment, the alkyl group is partially or completely deuterated, i.e., one or more hydrogen atoms of the alkyl group are replaced with deuterium atoms. Non-limiting exemplary C₁₋₁₀ alkyl groups include methyl (including —CD₃), ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, iso-butyl, 3-pentyl, hexyl, heptyl, octyl, nonyl, and decyl. Non-limiting exemplary C₁₋₄ alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, and iso-butyl. Non-limiting exemplary C₁₋₄ groups include methyl, ethyl, propyl, isopropyl, and tert-butyl.

For the purpose of the present disclosure, the term “optionally substituted alkyl” as used by itself or as part of another group means that the alkyl as defined above is either unsubstituted or substituted with one, two, or three substituents independently chosen from nitro, haloalkoxy, aryloxy, aralkyloxy, alkylthio, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, alkoxycarbonyl, and carboxyalkyl. In one embodiment, the alkyl is a C₁₋₆ alkyl. In another embodiment, the alkyl is a C₁₋₄ alkyl. In one embodiment, the optionally substituted alkyl is substituted with two substituents. In another embodiment, the optionally substituted alkyl is substituted with one substituent. Non-limiting exemplary optionally substituted alkyl groups include —CH₂CH₂NO₂, —CH₂CH₂CO₂H, —CH₂CH₂SO₂CH₃, —CH₂CH₂COPh, and —CH₂C₆H₁₁.

For the purpose of the present disclosure, the term “alkylenyl” as used herein by itself or part of another group refers to a divalent form of an alkyl group as defined above. In one embodiment, the alkylenyl is a divalent form of a C₁₋₆ alkyl. In one embodiment, the alkylenyl is a divalent form of a C₁₋₄ alkyl. Non-limiting exemplary alkylenyl groups include —CH₂CH₂—, —CH₂CH₂CH₂—, —CH₂CH(CH₃)CH₂—, and —CH₂C(CH₃)₂CH₂—.

For the purpose of the present disclosure, the term “cycloalkyl” as used by itself or as part of another group refers to saturated and partially unsaturated (containing one or two double bonds) cyclic aliphatic hydrocarbons containing one to three rings having from three to twelve carbon atoms (i.e., C₃₋₁₂ cycloalkyl) or the number of carbons designated. In one embodiment, the cycloalkyl group has two rings. In one embodiment, the cycloalkyl group has one ring. In another embodiment, the cycloalkyl group is chosen from a C₃₋₈ cycloalkyl group. In another embodiment, the cycloalkyl group is chosen from a C₃₋₆ cycloalkyl group. Non-limiting exemplary cycloalkyl groups include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, norbornyl, decalin, adamantyl, cyclohexenyl, spiro[3.3]heptane, and bicyclo[3.3.1]nonane.

For the purpose of the present disclosure, the term “optionally substituted cycloalkyl” as used by itself or as part of another group means that the cycloalkyl as defined above is either unsubstituted or substituted with one, two, or three substituents independently chosen from halo, nitro, cyano, hydroxy, amino, alkylamino, dialkylamino, cycloalkylamino, haloalkyl, hydroxyalkyl, alkoxy, haloalkoxy, aryloxy, aralkyl, aralkyloxy, alkylthio, carboxamido, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, carboxyalkyl, alkyl, optionally substituted cycloalkyl, alkenyl, alkynyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted heterocyclo, alkoxyalkyl, (amino)alkyl, hydroxyalkylamino, (alkylamino)alkyl, (dialkylamino)alkyl, (cyano)alkyl, (carboxamido)alkyl, mercaptoalkyl, (heterocyclo)alkyl, or (heteroaryl)alkyl. In one embodiment, the optionally substituted cycloalkyl is substituted with two substituents. In another embodiment, the optionally substituted cycloalkyl is substituted with one substituent. In one embodiment, the optionally substituted cycloalkyl is an (amino)cycloalkyl. For the purpose of the present disclosure, the term “(amino)cycloalkyl” as used by itself or as part of another group means that the optionally substituted cycloalkyl as defined above is substituted with one amino or alkylamino group, and optionally one or two additional substituents. In one embodiment, the optionally substituted cycloalkyl is an (amino)cyclohexyl. For the purpose of the present disclosure, the term “(amino)cyclohexyl” as used by itself or as part of another group means that the optionally substituted cycloalkyl as defined above is a cyclohexyl group substituted with one amino or alkylamino group, and optionally one or two additional substituents. Non-limiting exemplary optionally substituted cycloalkyl groups include:

Non-limiting exemplary (amino)cycloalkyl groups include:

Non-limiting exemplary (amino)cyclohexyl groups include:

For the purpose of the present disclosure, the term “optionally substituted cyclohexyl” as used by itself or as part of another group means that the optionally substituted cycloalkyl as defined above is an optionally substituted cyclohexyl group.

For the purpose of the present disclosure, the term “cycloalkylenyl” as used herein by itself or part of another group refers to a divalent form of an optionally substituted cycloalkyl group as defined above. In one embodiment, the cycloalkylenyl is a “cyclohexylenyl.” The term “cyclohexylenyl” as used herein by itself or part of another group refers to a divalent form of an optionally substituted cyclohexyl group.

Non-limiting exemplary cycloalkylenyl groups include:

For the purpose of the present disclosure, the term “1,4-cyclohexylenyl” as used herein by itself or part of another group refers to a cyclohexylenyl as defined above wherein the radicals are in the 1 and 4 positions of the cyclohexyl ring. Non-limiting exemplary 1,4-cyclohexylenyl groups include:

For the purpose of the present disclosure, the term “(cycloalkylenyl)alkyl” as used herein by itself or part of another group refers to an alkyl group substituted with a divalent form of an optionally substituted cycloalkyl group. In one embodiment, the cycloalkylenyl is a divalent form of optionally substituted cyclohexyl. In one embodiment, the alkyl is C₁₋₄ alkyl. Non-limiting exemplary (cycloalkylenyl)alkyl groups include:

For the purpose of the present disclosure, the term “cycloalkenyl” as used by itself or part of another group refers to a partially unsaturated cycloalkyl group as defined above. In one embodiment, the cycloalkenyl has one carbon-to-carbon double bond. In another embodiment, the cycloalkenyl group is chosen from a C₄₋₈ cycloalkenyl group. Exemplary cycloalkenyl groups include cyclopentenyl and cyclohexenyl.

For the purpose of the present disclosure, the term “optionally substituted cycloalkenyl” as used by itself or as part of another group means that the cycloalkenyl as defined above is either unsubstituted or substituted with one, two, or three substituents independently chosen from halo, nitro, cyano, hydroxy, amino, alkylamino, dialkylamino, haloalkyl, monohydroxyalkyl, dihydroxyalkyl, alkoxy, haloalkoxy, aryloxy, aralkyloxy, alkylthio, carboxamido, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, carboxyalkyl, alkyl, optionally substituted cycloalkyl, alkenyl, alkynyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted heterocyclo, alkoxyalkyl, (amino)alkyl, hydroxyalkylamino, (alkylamino)alkyl, (dialkylamino)alkyl, (cyano)alkyl, (carboxamido)alkyl, mercaptoalkyl, (heterocyclo)alkyl, and (heteroaryl)alkyl. In one embodiment, the optionally substituted cycloalkenyl is substituted with two substituents. In another embodiment, the optionally substituted cycloalkenyl is substituted with one substituent. In another embodiment, the cycloalkenyl is unsubstituted.

For the purpose of the present disclosure, the term “alkenyl” as used by itself or as part of another group refers to an alkyl group as defined above containing one, two or three carbon-to-carbon double bonds. In one embodiment, the alkenyl group is chosen from a C₂₋₆ alkenyl group. In another embodiment, the alkenyl group is chosen from a C₂₋₄ alkenyl group. Non-limiting exemplary alkenyl groups include ethenyl, propenyl, isopropenyl, butenyl, sec-butenyl, pentenyl, and hexenyl.

For the purpose of the present disclosure, the term “optionally substituted alkenyl” as used herein by itself or as part of another group means the alkenyl as defined above is either unsubstituted or substituted with one, two or three substituents independently chosen from halo, nitro, cyano, hydroxy, amino, alkylamino, dialkylamino, haloalkyl, hydroxyalkyl, alkoxy, haloalkoxy, aryloxy, aralkyloxy, alkylthio, carboxamido, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, carboxyalkyl, alkyl, optionally substituted cycloalkyl, alkenyl, alkynyl, optionally substituted aryl, optionally substituted heteroaryl, or optionally substituted heterocyclo.

For the purpose of the present disclosure, the term “alkynyl” as used by itself or as part of another group refers to an alkyl group as defined above containing one to three carbon-to-carbon triple bonds. In one embodiment, the alkynyl has one carbon-to-carbon triple bond. In one embodiment, the alkynyl group is chosen from a C₂₋₆ alkynyl group. In another embodiment, the alkynyl group is chosen from a C₂₋₄ alkynyl group. Non-limiting exemplary alkynyl groups include ethynyl, propynyl, butynyl, 2-butynyl, pentynyl, and hexynyl groups.

For the purpose of the present disclosure, the term “optionally substituted alkynyl” as used herein by itself or as part of another group means the alkynyl as defined above is either unsubstituted or substituted with one, two or three substituents independently chosen from halo, nitro, cyano, hydroxy, amino, alkylamino, dialkylamino, haloalkyl, hydroxyalkyl, alkoxy, haloalkoxy, aryloxy, aralkyloxy, alkylthio, carboxamido, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, carboxyalkyl, alkyl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or heterocyclo.

For the purpose of the present disclosure, the term “haloalkyl” as used by itself or as part of another group refers to an alkyl group substituted by one or more fluorine, chlorine, bromine and/or iodine atoms. In one embodiment, the alkyl group is substituted by one, two, or three fluorine and/or chlorine atoms. In another embodiment, the haloalkyl group is chosen from a C₁₋₄ haloalkyl group. Non-limiting exemplary haloalkyl groups include fluoromethyl, difluoromethyl, trifluoromethyl, pentafluoroethyl, 1,1-difluoroethyl, 2,2-difluoroethyl, 2,2,2-trifluoroethyl, 3,3,3-trifluoropropyl, 4,4,4-trifluorobutyl, and trichloromethyl groups.

For the purpose of the present disclosure, the term “fluoroalkyl” as used by itself or as part of another group refers to an alkyl group substituted by one or more fluorine atoms. In one embodiment, the alkyl group is substituted by one, two, or three fluorine atoms. In another embodiment, the fluoroalkyl group is chosen from a C₁₋₄ fluoroalkyl group. Non-limiting exemplary fluoroalkyl groups include fluoromethyl, difluoromethyl, trifluoromethyl, pentafluoroethyl, 1,1-difluoroethyl, 2,2-difluoroethyl, 2,2,2-trifluoroethyl, 3,3,3-trifluoropropyl, and 4,4,4-trifluorobutyl.

For the purpose of the present disclosure, the term “hydroxyalkyl” as used by itself or as part of another group refers to an alkyl group substituted with one or more, e.g., one, two, or three, hydroxy groups. In one embodiment, the hydroxyalkyl group is a monohydroxyalkyl group, i.e., substituted with one hydroxy group. In another embodiment, the hydroxyalkyl group is a dihydroxyalkyl group, i.e., substituted with two hydroxy groups. In another embodiment, the hydroxyalkyl group is chosen from a C₁₋₄ hydroxyalkyl group. Non-limiting exemplary hydroxyalkyl groups include hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups, such as 1-hydroxyethyl, 2-hydroxyethyl, 1,2-dihydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 3-hydroxybutyl, 4-hydroxybutyl, 2-hydroxy-1-methylpropyl, and 1,3-dihydroxyprop-2-yl.

For the purpose of the present disclosure, the term “alkoxy” as used by itself or as part of another group refers to an optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted alkenyl or optionally substituted alkynyl attached to a terminal oxygen atom. In one embodiment, the alkoxy group is chosen from a C₁₋₄ alkoxy group. In another embodiment, the alkoxy group is chosen from a C₁₋₄ alkyl attached to a terminal oxygen atom, e.g., methoxy, ethoxy, tert-butoxy, —OCH₂C≡CH, —OCH₂C≡CCH₃, and —OCH₂CH₂CH₂C≡CH.

For the purpose of the present disclosure, the term “alkylthio” as used by itself or as part of another group refers to a sulfur atom substituted by an optionally substituted alkyl group. In one embodiment, the alkylthio group is chosen from a C₁₋₄ alkylthio group. Non-limiting exemplary alkylthio groups include —SCH₃, and —SCH₂CH₃.

For the purpose of the present disclosure, the term “alkoxyalkyl” as used by itself or as part of another group refers to an alkyl group substituted with an alkoxy group. Non-limiting exemplary alkoxyalkyl groups include methoxymethyl, methoxyethyl, methoxypropyl, methoxybutyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, ethoxybutyl, propoxymethyl, iso-propoxymethyl, propoxyethyl, propoxypropyl, butoxymethyl, tert-butoxymethyl, isobutoxymethyl, sec-butoxymethyl, pentyloxymethyl, —CH₂OCH₂C≡CH and —CH₂OCH₂CH₂CH₂C≡CH.

For the purpose of the present disclosure, the term “haloalkoxy” as used by itself or as part of another group refers to a haloalkyl attached to a terminal oxygen atom. Non-limiting exemplary haloalkoxy groups include fluoromethoxy, difluoromethoxy, trifluoromethoxy, and 2,2,2-trifluoroethoxy.

For the purpose of the present disclosure, the term “heteroalkyl” as used by itself or part of another group refers to a stable straight or branched chain hydrocarbon radical containing 1 to 10 carbon atoms and at least two heteroatoms, which can be the same or different, selected from O, N, or S, wherein: 1) the nitrogen atom(s) and sulfur atom(s) can optionally be oxidized; and/or 2) the nitrogen atom(s) can optionally be quaternized. The heteroatoms can be placed at any interior position of the heteroalkyl group or at a position at which the heteroalkyl group is attached to the remainder of the molecule. In one embodiment, the heteroalkyl group contains two oxygen atoms. In one embodiment, the heteroalkyl contains one oxygen and one nitrogen atom, e.g., a (hydroxyalkylamino)alkyl group, e.g., —CH₂N(CH₃)CH₂CH₂CH₂OH. In one embodiment, the heteroalkyl contains two nitrogen atoms. Non-limiting exemplary heteroalkyl groups include —CH₂OCH₂CH₂OCH₃, —OCH₂CH₂OCH₂CH₂OCH₃, —CH—₂NHCH₂CH₂OCH₂, —OCH₂CH₂NH₂, —NHCH₂CH₂N(H)CH₃, —NHCH₂CH₂OCH₃, —CH₂OCH₂CH₂NH₂, —CH₂OCH₂CH₂N(H)CH₂CH₃, and —OCH₂CH₂OCH₃.

For the purpose of the present disclosure, the term “aryl” as used by itself or as part of another group refers to a monocyclic or bicyclic aromatic ring system having from six to fourteen carbon atoms (i.e., C₆₋₁₄ aryl). Non-limiting exemplary aryl groups include phenyl (abbreviated as “Ph”), naphthyl, phenanthryl, anthracyl, indenyl, azulenyl, biphenyl, biphenylenyl, and fluorenyl groups. In one embodiment, the aryl group is chosen from phenyl or naphthyl. In one embodiment, the aryl group is phenyl.

For the purpose of the present disclosure, the term “optionally substituted aryl” as used herein by itself or as part of another group means that the aryl as defined above is either unsubstituted or substituted with one to five substituents independently selected from the group consisting of halo, nitro, cyano, hydroxy, amino, alkylamino, dialkylamino, haloalkyl, hydroxyalkyl, alkoxy, haloalkoxy, aryloxy, heteroaryloxy, aralkyl aralkyloxy, (aralkyloxy)alkyl, alkylthio, carboxamido, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, carboxyalkyl, heteroalkyl optionally substituted alkyl, optionally substituted cycloalkyl, alkenyl, alkynyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted heterocyclo, (C₁₋₄ haloalkoxy)alkyl, alkoxyalkyl, (amino)alkyl, hydroxyalkylamino, (alkylamino)alkyl, (dialkylamino)alkyl, (cyano)alkyl, (carboxamido)alkyl, mercaptoalkyl, (heterocyclo)alkyl, (cycloalkylamino)alkyl, (hydroxyalkylamino)alkyl, (amino)(heteroaryl)alkyl, (heterocycloamino)alkyl (amino)(hydroxy)alkyl, (heteroaryl)alkyl, —N(R⁴³)(R⁴⁴), —CH₂N(H)C(═O)—R⁴⁵, and —N(H)C(═O)—R⁴⁵, wherein R⁴³ is hydrogen, C₁₋₄ alkyl, optionally substituted aryl, or optionally substituted heteroaryl; R⁴⁴ is alkoxyalkyl, (heterocyclo)alkyl, (amino)alkyl, (alkylamino)alkyl, or (dialkylamino)alkyl; and R⁴⁵ is alkyl, alkoxyalkyl, (heterocyclo)alkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, optionally substituted aryl, optionally substituted heteroaryl, aralkyl, or (heteroaryl)alkyl In one embodiment, the optionally substituted aryl is an optionally substituted phenyl. In one embodiment, the optionally substituted phenyl has four substituents. In another embodiment, the optionally substituted phenyl has three substituents. In another embodiment, the optionally substituted phenyl has two substituents. In another embodiment, the optionally substituted phenyl has one substituent. In another embodiment, the optionally substituted phenyl has at least one amino, alkylamino, dialkylamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (amino)(heteroaryl)alkyl, or (amino)(hydroxy)alkyl substituent. Non-limiting exemplary substituted aryl groups include 2-methylphenyl, 2-methoxyphenyl, 2-fluorophenyl, 2-chlorophenyl, 2-bromophenyl, 3-methylphenyl, 3-methoxyphenyl, 3-fluorophenyl, 3-chlorophenyl, 4-methylphenyl, 4-ethylphenyl, 4-methoxyphenyl, 4-fluorophenyl, 4-chlorophenyl, 2,6-di-fluorophenyl, 2,6-di-chlorophenyl, 2-methyl, 3-methoxyphenyl, 2-ethyl, 3-methoxyphenyl, 3,4-di-methoxyphenyl, 3,5-di-fluorophenyl 3,5-di-methylphenyl, 3,5-dimethoxy, 4-methylphenyl, 2-fluoro-3-chlorophenyl, 3-chloro-4-fluorophenyl, and 2-phenylpropan-2-amine. The term optionally substituted aryl is meant to include aryl groups having fused optionally substituted cycloalkyl and fused optionally substituted heterocyclo rings. Examples include:

For the purpose of the present disclosure, the term “arylenyl” as used herein by itself or part of another group refers to a divalent form of an optionally substituted aryl group as defined above. In one embodiment, the arylenyl is a divalent form of an optionally substituted phenyl. In one embodiment, the arylenyl is a divalent form of phenyl. Non-limiting exemplary alkylenyl groups include:

For the purpose of the present disclosure, the term “aryloxy” as used by itself or as part of another group refers to an optionally substituted aryl attached to a terminal oxygen atom. A non-limiting exemplary aryloxy group is PhO—.

For the purpose of the present disclosure, the term “heteroaryloxy” as used by itself or as part of another group refers to an optionally substituted heteroaryl attached to a terminal oxygen atom.

For the purpose of the present disclosure, the term “aralkyloxy” or “arylalkyloxy” as used by itself or as part of another group refers to an aralkyl group attached to a terminal oxygen atom. A non-limiting exemplary aralkyloxy group is PhCH₂O—.

For the purpose of the present disclosure, the term “(aralkyloxy)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with an aralkyloxy group. In one embodiment, the alkyl is a C₁₋₄ alkyl. Non-limiting exemplary “(aralkyloxy)alkyl” groups include —CH₂OCH₂(3-F-Ph) and —CH₂OCH₂CH₂CH₂(2-OMe-Ph).

For the purpose of the present disclosure, the term “heteroaryl” or “heteroaromatic” refers to monocyclic and bicyclic aromatic ring systems having 5 to 14 ring members (i.e., a 5- to 14-membered heteroaryl) and 1, 2, 3, or 4 heteroatoms independently chosen from oxygen, nitrogen or sulfur. In one embodiment, the heteroaryl has three heteroatoms. In another embodiment, the heteroaryl has two heteroatoms. In another embodiment, the heteroaryl has one heteroatom. In one embodiment, the heteroaryl has 5 ring atoms, e.g., thienyl. In another embodiment, the heteroaryl has 6 ring atoms, e.g., pyridyl. Non-limiting exemplary heteroaryl groups include thienyl, benzo[b]thienyl, naphtho[2,3-b]thienyl, thianthrenyl, furyl, benzofuryl, pyranyl, isobenzofuranyl, benzooxazonyl, chromenyl, xanthenyl, 2H-pyrrolyl, pyrrolyl, imidazolyl, pyrazolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, 3H-indolyl, indolyl, indazolyl, purinyl, isoquinolyl, quinolyl, phthalazinyl, naphthyridinyl, cinnolinyl, quinazolinyl, pteridinyl, 4aH-carbazolyl, carbazolyl, β-carbolinyl, phenanthridinyl, acridinyl, pyrimidinyl, phenanthrolinyl, phenazinyl, thiazolyl, isothiazolyl, phenothiazolyl, isoxazolyl, furazanyl, and phenoxazinyl. In one embodiment, the heteroaryl is chosen from thienyl (e.g., thien-2-yl and thien-3-yl), furyl (e.g., 2-furyl and 3-furyl), pyrrolyl (e.g., 1H-pyrrol-2-yl and 1H-pyrrol-3-yl), imidazolyl (e.g., 2H-imidazol-2-yl and 2H-imidazol-4-yl), pyrazolyl (e.g., 1H-pyrazol-3-yl, 1H-pyrazol-4-yl, and 1H-pyrazol-5-yl), pyridyl (e.g., pyridin-2-yl, pyridin-3-yl, and pyridin-4-yl), pyrimidinyl (e.g., pyrimidin-2-yl, pyrimidin-4-yl, and pyrimidin-5-yl), thiazolyl (e.g., thiazol-2-yl, thiazol-4-yl, and thiazol-5-yl), isothiazolyl (e.g., isothiazol-3-yl, isothiazol-4-yl, and isothiazol-5-yl), oxazolyl (e.g., oxazol-2-yl, oxazol-4-yl, and oxazol-5-yl) and isoxazolyl (e.g., isoxazol-3-yl, isoxazol-4-yl, and isoxazol-5-yl). The term “heteroaryl” is also meant to include possible N-oxides. Exemplary N-oxides include pyridyl N-oxide.

For the purpose of the present disclosure, the term “optionally substituted heteroaryl” as used by itself or as part of another group means that the heteroaryl as defined above is either unsubstituted or substituted with one to four substituents, e.g., one or two substituents, independently chosen from halo, nitro, cyano, hydroxy, amino, alkylamino, dialkylamino, haloalkyl, hydroxyalkyl, alkoxy, haloalkoxy, aralkyl, aryloxy, aralkyloxy, alkylthio, carboxamido, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, carboxyalkyl, alkyl, optionally substituted cycloalkyl, alkenyl, alkynyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted heterocyclo, alkoxyalkyl, (amino)alkyl, hydroxyalkylamino, (alkylamino)alkyl, (dialkylamino)alkyl, (cyano)alkyl, (carboxamido)alkyl, mercaptoalkyl, (heterocyclo)alkyl, (heteroaryl)alkyl, —N(R⁴³)(R⁴⁴), or —N(H)C(═O)—R⁴⁵, wherein R⁴³ is hydrogen or C₁₋₄ alkyl; R⁴⁴ is alkoxyalkyl, (heterocyclo)alkyl, (amino)alkyl, (alkylamino)alkyl, or (dialkylamino)alkyl; and R⁴⁵ is alkyl, optionally substituted aryl, or optionally substituted heteroaryl. In one embodiment, the optionally substituted heteroaryl has one substituent. In one embodiment, the substituent is amino, alkylamino, dialkylamino, (amino)alkyl, hydroxyalkylamino, (alkylamino)alkyl, (dialkylamino)alkyl, (heterocyclo)alkyl, —N(R⁴³)(R⁴⁴), or —N(H)C(═O)—R⁴⁵. In one embodiment, the substituent is aralkyl or (heteroaryl)alkyl. Examples include:

In one embodiment, the optionally substituted heteroaryl is an optionally substituted pyridyl, i.e., 2-, 3-, or 4-pyridyl. Any available carbon or nitrogen atom can be substituted. The term optionally substituted heteroaryl is meant to include heteroaryl groups having fused optionally substituted cycloalkyl and fused optionally substituted heterocyclo rings. Examples include:

For the purpose of the present disclosure, the term “heteroarylenyl” as used herein by itself or part of another group refers to a divalent form of an optionally substituted heteroaryl group as defined above. In one embodiment, the heteroarylenyl is a divalent form of an optionally substituted pyridyl. Non-limiting exemplary heteroarylenyl groups include:

For the purpose of the present disclosure, the term “heterocycle” or “heterocyclo” as used by itself or as part of another group refers to saturated and partially unsaturated (e.g., containing one or two double bonds) cyclic groups containing one, two, or three rings having from three to fourteen ring members (i.e., a 3- to 14-membered heterocyclo) and at least one heteroatom. Each heteroatom is independently selected from the group consisting of oxygen, sulfur, including sulfoxide and sulfone, and/or nitrogen atoms, which can be quaternized. The term “heterocyclo” is meant to include cyclic ureido groups such as imidazolidinyl-2-one, cyclic amide groups such as β-lactam, γ-lactam, δ-lactam and ε-lactam, and cyclic carbamate groups such as oxazolidinyl-2-one. The term “heterocyclo” is also meant to include groups having fused optionally substituted aryl groups, e.g., indolinyl, indolinyl-2-one, benzo[d]oxazolyl-2(3H)-one. In one embodiment, the heterocyclo group is chosen from a 4-, 5-, 6-, 7- or 8-membered cyclic group containing one ring and one or two oxygen and/or nitrogen atoms. In one embodiment, the heterocyclo group is chosen from a 5- or 6-membered cyclic group containing one ring and one or two nitrogen atoms. In one embodiment, the heterocyclo group is chosen from a 8-, 9-, 10-, 11-, or 12-membered cyclic group containing two rings and one or two nitrogen atoms. The heterocyclo can be optionally linked to the rest of the molecule through a carbon or nitrogen atom. Non-limiting exemplary heterocyclo groups include 2-oxopyrrolidin-3-yl, 2-imidazolidinone, piperidinyl, morpholinyl, piperazinyl, pyrrolidinyl, 8-azabicyclo[3.2.1]octane (nortropane), 6-azaspiro[2.5]octane, 6-azaspiro[3.4]octane, indolinyl, indolinyl-2-one, 1,3-dihydro-2H-benzo[d]imidazol-2-one

For the purpose of the present disclosure, the term “optionally substituted heterocyclo” as used herein by itself or part of another group means the heterocyclo as defined above is either unsubstituted or substituted with one to four substituents independently selected from halo, nitro, cyano, hydroxy, amino, alkylamino, dialkylamino, haloalkyl, hydroxyalkyl, alkoxy, haloalkoxy, aryloxy, aralkyl aralkyloxy, alkylthio, carboxamido, sulfonamido, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, ureido, guanidino, carboxy, carboxyalkyl, alkyl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, heterocyclo, alkoxyalkyl, (amino)alkyl, hydroxyalkylamino, (alkylamino)alkyl, (dialkylamino)alkyl, (cyano)alkyl, (carboxamido)alkyl, mercaptoalkyl, (heterocyclo)alkyl, and (heteroaryl)alkyl. Substitution may occur on any available carbon or nitrogen atom, and may form a spirocycle. In one embodiment, the optionally substituted heterocyclo is substituted with at least one amino, alkylamino, or dialkylamino group. Non-limiting exemplary optionally substituted heterocyclo groups include:

For the purpose of the present disclosure, the term “heterocyclenyl” as used herein by itself or part of another group refers to a divalent form of an optionally substituted heterocyclo group as defined above. In one embodiment, the heterocyclenyl is a divalent form of an optionally substituted azetidine. In one embodiment, the heterocyclenyl is a divalent form of an optionally substituted piperidinyl. Non-limiting exemplary heterocyclenyl groups include:

For the purpose of the present disclosure, the term “optionally substituted pyrrolidinyl” as used by itself or as part of another group means that the optionally substituted heterocyclo as defined above is an optionally substituted pyrrolidinyl group.

For the purpose of the present disclosure, the term “optionally substituted pyrrolidinenyl” as used herein by itself or part of another group refers to a divalent form of an optionally substituted pyrrolidinyl group as defined above. Non-limiting exemplary optionally substituted pyrrolidinenyl groups include:

For the purpose of the present disclosure, the term “optionally substituted, optionally bridged piperidinenyl” as used by itself or as part of another group refers to a divalent form having the following structure:

wherein:

R^(2′a), R^(2′b), R^(3′a), R^(3′b), R^(4′a), R^(4′b), R^(5′a), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, C₁₋₆ alkyl, C₃₋₁₂ cycloalkyl, haloalkyl, hydroxyalkyl, optionally substituted C₆₋₁₄ aryl, aralkyl, and alkoxycarbonyl; or

R^(2′a) and R^(2′b) taken together with the carbon atom to which they are attached form a C₃₋₆ cycloalkyl; and R^(3′a), R^(3′b), R^(4′a), R^(4′b), R^(5′a), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl; or

R^(3′a) and R^(3′b) taken together with the carbon atom to which they are attached form a C₃₋₆ cycloalkyl; and R^(2′a), R^(2′b), R^(4′a), R^(4′b), R^(5′a), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl; or

R^(4a) and R^(4′b) taken together with the carbon atom to which they are attached form a C₃₋₆ cycloalkyl; and R^(2′a), R^(2′b), R^(3′a), R^(3′b), R^(5′a), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl; or

R^(5′a) and R^(5′b) taken together with the carbon atom to which they are attached form a C₃₋₆ cycloalkyl; and R^(2′a), R^(2′b), R^(3′a), R^(3′b), R^(4′a), and R^(4′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl; or

R^(2′a) and R^(5′a) taken together form a C₁₋₄ bridge; and R^(2′b), R^(3′a), R^(3′b), R^(4′a), R^(4′b), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl; or

R^(3′a) and R^(4′a) taken together form a C₁-4 bridge; and R^(2′a), R^(2′b), R^(3′b), R^(4′a), R^(5′a), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl; or

R^(2′a) and R^(4′a) taken together form a C₁₋₄ bridge; and R^(2′b), R^(3a), R^(3′b), R^(4′b), R^(5′a), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl; or

R^(3′a) and R^(5′a) taken form a C₁₋₄ bridge; and R^(2′a), R^(2′b), R^(3′b), R^(4′a), R^(4′b), and R^(5′b) are each independently selected from the group consisting of hydrogen, halo, and C₁₋₄ alkyl;

R^(6′) is selected from the group consisting of hydrogen and C₁₋₄ alkyl;

For the purpose of the present disclosure, the term “amino” as used by itself or as part of another group refers to —NH₂.

For the purpose of the present disclosure, the term “alkylamino” as used by itself or as part of another group refers to —NHR²², wherein R²² is C₁₋₆ alkyl. In one embodiment, R²² is C₁₋₄ alkyl. Non-limiting exemplary alkylamino groups include —N(H)CH₃ and —N(H)CH₂CH₃.

For the purpose of the present disclosure, the term “dialkylamino” as used by itself or as part of another group refers to —NR^(23a)R^(23b), wherein R^(23a) and R^(23b) are each independently C₁₋₆ alkyl. In one embodiment, R^(23a) and R^(23b) are each independently C₁₋₄ alkyl. Non-limiting exemplary dialkylamino groups include —N(CH₃)₂ and —N(CH₃)CH₂CH(CH₃)₂.

For the purpose of the present disclosure, the term “hydroxyalkylamino” as used by itself or as part of another group refers to —NR^(24a) R^(24b), wherein R^(24a) is hydrogen or C₁₋₄ alkyl, and R^(24b) is hydroxyalkyl. Non-limiting exemplary hydroxyalkylamino groups include —N(H)CH₂CH₂OH, —N(H)CH₂CH₂CH₂OH, —N(CH₃)CH₂CH₂OH, and —N(CH₃)CH₂CH₂CH₂OH

For the purpose of the present disclosure, the term “(hydroxyalkylamino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with an hydroxyalkylamino group. In one embodiment, the alkyl is a C₁₋₄ alkyl. A non-limiting exemplary (hydroxyalkylamino)alkyl group is —CH₂N(CH₃)CH₂CH₂CH₂OH.

For the purpose of the present disclosure, the term “cycloalkylamino” as used by itself or as part of another group refers to —NR^(25a)R^(25b), wherein R^(25a) is optionally substituted cycloalkyl and R^(25b) is hydrogen or C₁₋₄ alkyl.

For the purpose of the present disclosure, the term “heterocycloamino” as used by itself or as part of another group refers to —NR²⁵R^(25d), wherein R^(25c) is optionally substituted heterocyclo and R^(25d) is hydrogen or C₁₋₄ alkyl. Non-limiting exemplary heterocycloamino groups include:

For the purpose of the present disclosure, the term “(heterocycloamino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with an heterocycloamino group. In one embodiment, the alkyl is a C₁₋₄ alkyl.

For the purpose of the present disclosure, the term “aralkylamino” as used by itself or as part of another group refers to —NR^(26a)R^(26b), wherein R^(26a) is aralkyl and R^(26b) is hydrogen or C₁₋₄ alkyl. Non-limiting exemplary aralkylamino groups include —N(H)CH₂Ph and —N(CH₃)CH₂Ph.

For the purpose of the present disclosure, the term “(amino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with an amino group. In one embodiment, the alkyl is a C₁₋₄ alkyl. Non-limiting exemplary (amino)alkyl groups include —CH₂NH₂, —C(NH₂)(H)CH₃, —CH₂CH₂NH₂, —CH₂C(NH₂)(H)CH₃, —CH₂CH₂CH₂NH₂, —CH₂CH₂CH₂CH₂NH₂, and —CH₂C(CH₃)₂CH₂NH₂.

For the purpose of the present disclosure, the term “(alkylamino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with an alkylamino group. In one embodiment, the alkyl is a C₁₋₄ alkyl. A non-limiting exemplary (alkylamino)alkyl group is —CH₂CH₂N(H)CH₃.

For the purpose of the present disclosure, the term “(dialkylamino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted by a dialkylamino group. In one embodiment, the alkyl is a C₁₋₄ alkyl. Non-limiting exemplary (dialkylamino)alkyl groups are —CH₂CH₂N(CH₃)₂.

For the purpose of the present disclosure, the term “(cycloalkylamino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted by a cycloalkylamino group. In one embodiment, the alkyl is a C₁₋₄ alkyl. Non-limiting exemplary (cycloalkylamino)alkyl groups include —CH₂N(H)cyclopropyl, —CH₂N(H)cyclobutyl, and —CH₂N(H)cyclohexyl.

For the purpose of the present disclosure, the term “(aralkylamino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with an aralkylamino group. In one embodiment, the alkyl is a C₁₋₄ alkyl. A non-limiting exemplary (aralkylamino)alkyl group is —CH₂CH₂CH₂N(H)CH₂Ph.

For the purpose of the present disclosure, the term “(hydroxyalkylamino)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with an hydroxyalkylamino group. A non-limiting exemplary (hydroxyalkylamino)alkyl group is —CH₂CH₂NHCH₂CH₂OH

For the purpose of the present disclosure, the term “(cyano)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one or more cyano, e.g., —CN, groups. In one embodiment, the alkyl is a C₁₋₄ alkyl. Non-limiting exemplary (cyano)alkyl groups include —CH₂CH₂CN, —CH₂CH₂CH₂CN, and —CH₂CH₂CH₂CH₂CN.

For the purpose of the present disclosure, the term “(amino)(hydroxy)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one amino, alkylamino, dialkylamino, or heterocyclo group and one hydroxy group. In one embodiment, the alkyl is a C₁₋₆ alkyl. In another embodiment, the alkyl is a C₁₋₄ alkyl.

Non-limiting exemplary (amino)(hydroxy)alkyl groups include:

For the purpose of the present disclosure, the term “(amino)(carboxamido)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one amino, alkylamino, or dialkylamino, and one carboxamido group. In one embodiment, the alkyl is a C₁₋₆ alkyl. Non-limiting exemplary (amino)(carboxamido)alkyl groups include:

For the purpose of the present disclosure, the term “(amino)(aryl)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one amino, alkylamino, or dialkylamino group and one optionally substituted aryl group. In one embodiment, the alkyl is a C₁₋₆ alkyl. In one embodiment, the optionally substituted aryl group is an optionally substituted phenyl. Non-limiting exemplary (amino)(aryl)alkyl groups include:

For the purpose of the present disclosure, the term “(amino)(heteroaryl)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one amino, alkylamino, or dialkylamino group and one optionally substituted heteroaryl group. In one embodiment, the alkyl is a C₁₋₆ alkyl. In one embodiment, the alkyl is a C₁₋₄ alkyl. In one embodiment, the optionally substituted heteroaryl group is an optionally substituted pyridyl. Non-limiting exemplary (amino)(heteroaryl)alkyl groups include:

For the purpose of the present disclosure, the term “(cycloalkyl)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one optionally substituted cycloalkyl group. In one embodiment, the alkyl is a C₁₋₄ alkyl. In one embodiment, the cycloalkyl is a C₃₋₆ cycloalkyl. In one embodiment, the optionally substituted cycloalkyl group is substituted with an amino or (amino)alkyl group.

Non-limiting exemplary (cycloalkyl)alkyl groups include:

For the purpose of the present disclosure, the term “(hydroxy)(aryl)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one hydroxy group and one optionally substituted aryl group. In one embodiment, the alkyl is a C₁₋₆ alkyl. In one embodiment, the optionally substituted aryl group is an optionally substituted phenyl. Non-limiting exemplary (hydroxy)(aryl)alkyl groups include:

For the purpose of the present disclosure, the term “carboxamido” as used by itself or as part of another group refers to a radical of formula —C(═O)NR^(26a)R^(26b), wherein R^(26a) and R^(26b) are each independently hydrogen, optionally substituted alkyl, optionally substituted aryl, aralkyl, (heteroaryl)alkyl, or optionally substituted heteroaryl, or R^(26a) and R^(26b) taken together with the nitrogen to which they are attached from a 3- to 8-membered heterocyclo group. In one embodiment, R^(26a) and R^(26b) are each independently hydrogen or optionally substituted alkyl. Non-limiting exemplary carboxamido groups include —CONH₂, —CON(H)CH₃, CON(CH₃)₂, and —CON(H)Ph.

For the purpose of the present disclosure, the term “(carboxamido)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with a carboxamido group. Non-limiting exemplary (carboxamido)alkyl groups include —CH₂CONH₂, —C(H)CH₃—CONH₂, and —CH₂CON(H)CH₃.

For the purpose of the present disclosure, the term “sulfonamido” as used by itself or as part of another group refers to a radical of the formula —SO₂NR^(27a)R^(27b), wherein R^(27a) and R^(27b) are each independently hydrogen, optionally substituted alkyl, or optionally substituted aryl, or R^(27a) and R^(27b) taken together with the nitrogen to which they are attached from a 3- to 8-membered heterocyclo group. Non-limiting exemplary sulfonamido groups include —SO₂NH₂, —SO₂N(H)CH₃, and —SO₂N(H)Ph.

For the purpose of the present disclosure, the term “alkylcarbonyl” as used by itself or as part of another group refers to a carbonyl group, i.e., —C(═O)—, substituted by an alkyl group. A non-limiting exemplary alkylcarbonyl group is —COCH₃.

For the purpose of the present disclosure, the term “arylcarbonyl” as used by itself or as part of another group refers to a carbonyl group, i.e., —C(═O)—, substituted by an optionally substituted aryl group. A non-limiting exemplary arylcarbonyl group is —COPh.

For the purpose of the present disclosure, the term “alkylsulfonyl” as used by itself or as part of another group refers to a sulfonyl group, i.e., —SO₂—, substituted by any of the above-mentioned optionally substituted alkyl groups. A non-limiting exemplary alkylsulfonyl group is —SO₂CH₃.

For the purpose of the present disclosure, the term “arylsulfonyl” as used by itself or as part of another group refers to a sulfonyl group, i.e., —SO₂—, substituted by any of the above-mentioned optionally substituted aryl groups. A non-limiting exemplary arylsulfonyl group is —SO₂Ph.

For the purpose of the present disclosure, the term “mercaptoalkyl” as used by itself or as part of another group refers to any of the above-mentioned alkyl groups substituted by a —SH group.

For the purpose of the present disclosure, the term “carboxy” as used by itself or as part of another group refers to a radical of the formula —COOH.

For the purpose of the present disclosure, the term “carboxyalkyl” as used by itself or as part of another group refers to any of the above-mentioned alkyl groups substituted with a —COOH. A non-limiting exemplary carboxyalkyl group is —CH₂CO₂H.

For the purpose of the present disclosure, the term “alkoxycarbonyl” as used by itself or as part of another group refers to a carbonyl group, i.e., —C(═O)—, substituted by an alkoxy group. Non-limiting exemplary alkoxycarbonyl groups are —CO₂Me and —CO₂Et.

For the purpose of the present disclosure, the term “aralkyl” or “arylalkyl” as used by itself or as part of another group refers to an alkyl group substituted with one, two, or three optionally substituted aryl groups. In one embodiment, the aralkyl group is a C₁₋₄ alkyl substituted with one optionally substituted aryl group. Non-limiting exemplary aralkyl groups include benzyl, phenethyl, —CHPh₂, —CH₂(4-OH-Ph), and —CH(4-F-Ph)₂.

For the purpose of the present disclosure, the term “ureido” as used by itself or as part of another group refers to a radical of the formula —NR^(30a)—C(═O)—NR^(30b)R^(30c), wherein R^(22a) is hydrogen, alkyl, or optionally substituted aryl, and R^(30b) and R^(30c) are each independently hydrogen, alkyl, or optionally substituted aryl, or R^(30b) and R^(30c) taken together with the nitrogen to which they are attached form a 4- to 8-membered heterocyclo group. Non-limiting exemplary ureido groups include —NH—C(C═O)—NH₂ and —NH—C(C═O)—NHCH₃.

For the purpose of the present disclosure, the term “guanidino” as used by itself or as part of another group refers to a radical of the formula —NR^(28a)—C(═NR²⁹)—NR^(28b)R²⁸, wherein R^(28a), R^(28b), and R^(28c) are each independently hydrogen, alkyl, or optionally substituted aryl, and R²⁹ is hydrogen, alkyl, cyano, alkylsulfonyl, alkylcarbonyl, carboxamido, or sulfonamido. Non-limiting exemplary guanidino groups include —NH—C(C═NH)—NH₂, —NH—C(C═NCN)—NH₂, and —NH—C(C═NH)—NHCH₃.

For the purpose of the present disclosure, the term “(heterocyclo)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one, two, or three optionally substituted heterocyclo groups. In one embodiment, the (heterocyclo)alkyl is a C₁₋₄ alkyl substituted with one optionally substituted heterocyclo group. The heterocyclo can be linked to the alkyl group through a carbon or nitrogen atom. Non-limiting exemplary (heterocyclo)alkyl groups include:

For the purpose of the present disclosure, the term “(heteroaryl)alkyl” as used by itself or as part of another group refers to an alkyl group substituted with one, two, or three optionally substituted heteroaryl groups. In one embodiment, the (heteroaryl)alkyl group is a C₁₋₄ alkyl substituted with one optionally substituted heteroaryl group.

Non-limiting exemplary (heteroaryl)alkyl groups include:

For the purpose of the present disclosure, the term “alkylcarbonylamino” as used by itself or as part of another group refers to an alkylcarbonyl group attached to an amino. A non-limiting exemplary alkylcarbonylamino group is —NHCOCH₃.

For the purpose of the present disclosure, the term “C₁₋₄ bridge” refers to a —CH₂—, —(CH₂)₂—, —(CH₂)₃—, or —(CH₂)₄— group that joins two carbon atoms of a piperidine to form an azabicyclo group. For example, in Formula I, R^(3a) and R^(4a) of B can be taken together to form a 6-azabicyclo[3.1.1]heptane, 8-azabicyclo[3.2.1]octane, 9-azabicyclo[3.3.1]nonane, or 10-azabicyclo[4.3.1]decane group. Each methylene unit of the C₁₋₄ bridge can be optionally substituted with one or two substituents independently selected from the group consisting of C₁₋₄ alkyl and halo.

The present disclosure encompasses any of the Compounds of the Disclosure being isotopically-labelled (i.e., radiolabeled) by having one or more atoms replaced by an atom having a different atomic mass or mass number. Examples of isotopes that can be incorporated into the disclosed compounds include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorous, fluorine and chlorine, such as ²H (or deuterium (D)), ³H, ¹¹C, ¹³C, ¹⁴C, ¹⁵N, ¹⁸O, ¹⁷O, ³¹P, ³²P, ³⁵S, ¹⁸F, and ³⁶Cl, respectively, e.g., ³H, ¹¹C, and ¹⁴C. In one embodiment, provided is a composition wherein substantially all of the atoms at a position within the Compound of the Disclosure are replaced by an atom having a different atomic mass or mass number. In another embodiment, provided is a composition wherein a portion of the atoms at a position within the Compound of the disclosure are replaced, i.e., the Compound of the Disclosure is enriched at a position with an atom having a different atomic mass or mass number.” Isotopically-labelled Compounds of the Disclosure can be prepared by methods known in the art.

Compounds of the Disclosure may contain one or more asymmetric centers and may thus give rise to enantiomers, diastereomers, and other stereoisomeric forms. The present disclosure is meant to encompass the use of all such possible forms, as well as their racemic and resolved forms and mixtures thereof. The individual enantiomers can be separated according to methods known in the art in view of the present disclosure. When the compounds described herein contain olefinic double bonds or other centers of geometric asymmetry, and unless specified otherwise, it is intended that they include both E and Z geometric isomers. All tautomers are intended to be encompassed by the present disclosure as well.

As used herein, the term “stereoisomers” is a general term for all isomers of individual molecules that differ only in the orientation of their atoms in space. It includes enantiomers and isomers of compounds with more than one chiral center that are not mirror images of one another (diastereomers).

The term “chiral center” or “asymmetric carbon atom” refers to a carbon atom to which four different groups are attached.

The terms “enantiomer” and “enantiomeric” refer to a molecule that cannot be superimposed on its mirror image and hence is optically active wherein the enantiomer rotates the plane of polarized light in one direction and its mirror image compound rotates the plane of polarized light in the opposite direction.

The term “racemic” refers to a mixture of equal parts of enantiomers and which mixture is optically inactive.

The term “absolute configuration” refers to the spatial arrangement of the atoms of a chiral molecular entity (or group) and its stereochemical description, e.g., R or S.

The stereochemical terms and conventions used in the specification are meant to be consistent with those described in Pure & Appl. Chem 68:2193 (1996), unless otherwise indicated.

The term “enantiomeric excess” or “ee” refers to a measure for how much of one enantiomer is present compared to the other. For a mixture of R and S enantiomers, the percent enantiomeric excess is defined as |R−S|*100, where R and S are the respective mole or weight fractions of enantiomers in a mixture such that R+S=1. With knowledge of the optical rotation of a chiral substance, the percent enantiomeric excess is defined as ([α]_(obs)/[α]_(max))*100, where [α]_(obs) is the optical rotation of the mixture of enantiomers and [α]_(max) is the optical rotation of the pure enantiomer. Determination of enantiomeric excess is possible using a variety of analytical techniques, including NMR spectroscopy, chiral column chromatography or optical polarimetry.

The terms “enantiomerically pure” or “enantiopure” refer to a sample of a chiral substance all of whose molecules (within the limits of detection) have the same chirality sense.

The terms “enantiomerically enriched” or “enantioenriched” refer to a sample of a chiral substance whose enantiomeric ratio is greater than 50:50. Enantiomerically enriched compounds may be enantiomerically pure.

The terms “a” and “an” refer to one or more.

The term “about,” as used herein, includes the recited number±10%. Thus, “about 10” means 9 to 11.

The present disclosure encompasses the preparation and use of salts of the Compounds of the Disclosure, including non-toxic pharmaceutically acceptable salts. Examples of pharmaceutically acceptable addition salts include inorganic and organic acid addition salts and basic salts. The pharmaceutically acceptable salts include, but are not limited to, metal salts such as sodium salt, potassium salt, cesium salt and the like; alkaline earth metals such as calcium salt, magnesium salt and the like; organic amine salts such as triethylamine salt, pyridine salt, picoline salt, ethanolamine salt, triethanolamine salt, dicyclohexylamine salt, N,N′-dibenzylethylenediamine salt and the like; inorganic acid salts such as hydrochloride, hydrobromide, phosphate, sulphate and the like; organic acid salts such as citrate, lactate, tartrate, maleate, fumarate, mandelate, acetate, dichloroacetate, trifluoroacetate, oxalate, formate and the like; sulfonates such as methanesulfonate, benzenesulfonate, p-toluenesulfonate and the like; and amino acid salts such as arginate, asparginate, glutamate and the like. The term “pharmaceutically acceptable salt” as used herein, refers to any salt, e.g., obtained by reaction with an acid or a base, of a Compound of the Disclosure that is physiologically tolerated in the target patient (e.g., a mammal, e.g., a human).

Acid addition salts can be formed by mixing a solution of the particular Compound of the Disclosure with a solution of a pharmaceutically acceptable non-toxic acid such as hydrochloric acid, fumaric acid, maleic acid, succinic acid, acetic acid, citric acid, tartaric acid, carbonic acid, phosphoric acid, oxalic acid, dichloroacetic acid, or the like. Basic salts can be formed by mixing a solution of the compound of the present disclosure with a solution of a pharmaceutically acceptable non-toxic base such as sodium hydroxide, potassium hydroxide, choline hydroxide, sodium carbonate and the like.

The present disclosure encompasses the preparation and use of solvates of Compounds of the Disclosure. Solvates typically do not significantly alter the physiological activity or toxicity of the compounds, and as such may function as pharmacological equivalents. The term “solvate” as used herein is a combination, physical association and/or solvation of a compound of the present disclosure with a solvent molecule such as, e.g. a disolvate, monosolvate or hemisolvate, where the ratio of solvent molecule to compound of the present disclosure is about 2:1, about 1:1 or about 1:2, respectively. This physical association involves varying degrees of ionic and covalent bonding, including hydrogen bonding. In certain instances, the solvate can be isolated, such as when one or more solvent molecules are incorporated into the crystal lattice of a crystalline solid. Thus, “solvate” encompasses both solution-phase and isolatable solvates. Compounds of the Disclosure can be present as solvated forms with a pharmaceutically acceptable solvent, such as water, methanol, ethanol, and the like, and it is intended that the disclosure includes both solvated and unsolvated forms of Compounds of the Disclosure. One type of solvate is a hydrate. A “hydrate” relates to a particular subgroup of solvates where the solvent molecule is water. Solvates typically can function as pharmacological equivalents. Preparation of solvates is known in the art. See, for example, M. Caira et al, J. Pharmaceut. Sci., 93(3):601-611 (2004), which describes the preparation of solvates of fluconazole with ethyl acetate and with water. Similar preparation of solvates, hemisolvates, hydrates, and the like are described by E. C. van Tonder et al., AAPS Pharm. Sci. Tech., 5(1): Article 12 (2004), and A. L. Bingham et al., Chem. Commun. 603-604 (2001). A typical, non-limiting, process of preparing a solvate would involve dissolving a Compound of the Disclosure in a desired solvent (organic, water, or a mixture thereof) at temperatures above 20° C. to about 25° C., then cooling the solution at a rate sufficient to form crystals, and isolating the crystals by known methods, e.g., filtration. Analytical techniques such as infrared spectroscopy can be used to confirm the presence of the solvent in a crystal of the solvate.

Since Compounds of the Disclosure are inhibitors of SMYD proteins, such as SMYD3 and SMYD2, a number of diseases, conditions, or disorders mediated by SMYD proteins, such as SMYD3 and SMYD2, can be treated by employing these compounds. The present disclosure is thus directed generally to a method for treating a disease, condition, or disorder responsive to the inhibition of SMYD proteins, such as SMYD3 and SMYD2, in an animal suffering from, or at risk of suffering from, the disorder, the method comprising administering to the animal an effective amount of one or more Compounds of the Disclosure.

The present disclosure is further directed to a method of inhibiting SMYD proteins in an animal in need thereof, the method comprising administering to the animal a therapeutically effective amount of at least one Compound of the Disclosure.

The present disclosure is further directed to a method of inhibiting SMYD3 in an animal in need thereof, the method comprising administering to the animal a therapeutically effective amount of at least one Compound of the Disclosure.

The present disclosure is further directed to a method of inhibiting SMYD2 in an animal in need thereof, the method comprising administering to the animal a therapeutically effective amount of at least one Compound of the Disclosure.

As used herein, the terms “treat,” “treating,” “treatment,” and the like refer to eliminating, reducing, or ameliorating a disease or condition, and/or symptoms associated therewith. Although not precluded, treating a disease or condition does not require that the disease, condition, or symptoms associated therewith be completely eliminated. As used herein, the terms “treat,” “treating,” “treatment,” and the like may include “prophylactic treatment,” which refers to reducing the probability of redeveloping a disease or condition, or of a recurrence of a previously-controlled disease or condition, in a subject who does not have, but is at risk of or is susceptible to, redeveloping a disease or condition or a recurrence of the disease or condition. The term “treat” and synonyms contemplate administering a therapeutically effective amount of a Compound of the Disclosure to an individual in need of such treatment.

Within the meaning of the disclosure, “treatment” also includes relapse prophylaxis or phase prophylaxis, as well as the treatment of acute or chronic signs, symptoms and/or malfunctions. The treatment can be orientated symptomatically, for example, to suppress symptoms. It can be effected over a short period, be oriented over a medium term, or can be a long-term treatment, for example within the context of a maintenance therapy.

The term “therapeutically effective amount” or “effective dose” as used herein refers to an amount of the active ingredient(s) that is(are) sufficient, when administered by a method of the disclosure, to efficaciously deliver the active ingredient(s) for the treatment of condition or disease of interest to an individual in need thereof. In the case of a cancer or other proliferation disorder, the therapeutically effective amount of the agent may reduce (i.e., retard to some extent and preferably stop) unwanted cellular proliferation; reduce the number of cancer cells; reduce the tumor size; inhibit (i.e., retard to some extent and preferably stop) cancer cell infiltration into peripheral organs; inhibit (i.e., retard to some extent and preferably stop) tumor metastasis; inhibit, to some extent, tumor growth; modulate protein methylation in the target cells; and/or relieve, to some extent, one or more of the symptoms associated with the cancer. To the extent the administered compound or composition prevents growth and/or kills existing cancer cells, it may be cytostatic and/or cytotoxic.

The term “container” means any receptacle and closure therefore suitable for storing, shipping, dispensing, and/or handling a pharmaceutical product.

The term “insert” means information accompanying a pharmaceutical product that provides a description of how to administer the product, along with the safety and efficacy data required to allow the physician, pharmacist, and patient to make an informed decision regarding use of the product. The package insert generally is regarded as the “label” for a pharmaceutical product.

The term “disease” or “condition” or “disorder” denotes disturbances and/or anomalies that as a rule are regarded as being pathological conditions or functions, and that can manifest themselves in the form of particular signs, symptoms, and/or malfunctions. As demonstrated below, Compounds of the Disclosure inhibit SMYD proteins, such as SMYD3 and SMYD2 and can be used in treating diseases and conditions such as proliferative diseases, wherein inhibition of SMYD proteins, such as SMYD3 and SMYD2 provides a benefit.

In some embodiments, the Compounds of the Disclosure can be used to treat a “SMYD protein mediated disorder” (e.g., a SMYD3-mediated disorder or a SMYD2-mediated disorder). A SMYD protein mediated disorder is any pathological condition in which a SMYD protein is know to play a role. In some embodiments, a SMYD-mediated disorder is a proliferative disease.

In some embodiments inhibiting SMYD proteins, such as SMYD3 and SMYD2, is the inhibition of the activity of one or more activities of SMYD proteins such as SMYD3 and SMYD2. In some embodiments, the activity of the SMYD proteins such as SMYD3 and SMYD2 is the ability of the SMYD protein such as SMYD3 or SMYD2 to transfer a methyl group to a target protein (e.g., histone). It should be appreciated that the activity of the one or more SMYD proteins such as SMYD3 and SMYD2 may be inhibited in vitro or in vivo. Exemplary levels of inhibition of the activity one or more SMYD proteins such as SMYD3 and SMYD2 include at least 10% inhibition, at least 20% inhibition, at least 30% inhibition, at least 40% inhibition, at least 50% inhibition, at least 60% inhibition, at least 70% inhibition, at least 80% inhibition, at least 90% inhibition, and up to 100% inhibition.

The SMYD (SET and MYND domain) family of lysine methyltransferases (KMTs) plays pivotal roles in various cellular processes, including gene expression regulation and DNA damage response. The family of human SMYD proteins consists of SMYD1, SMYD2, SMYD3, SMYD4 and SMYD5. SMYD1, SMYD2, and SMYD3 share a high degree of sequence homology and, with the exception of SMYD5, human SMYD proteins harbor at least one C-terminal tetratrico peptide repeat (TPR) domain. (See e.g., Abu-Farha et al. J Mol Cell Biol (2011) 3 (5) 301-308). The SMYD proteins have been found to be linked to various cancers (See e.g., Hamamoto et al. Nat Cell. Biol. 2004, 6: 731-740), Hu et al. Cancer Research 2009, 4067-4072, and Komatsu et al. Carcinogenesis 2009, 301139-1146.)

SMYD3 is a protein methyltransferase found to be expressed at high levels in a number of different cancers (Hamamoto, R., et al., Nat. Cell Biol., 6(8):731-40 (2004)). SMYD3 likely plays a role in the regulation of gene transcription and signal transduction pathways critical for survival of breast, liver, prostate and lung cancer cell lines (Hamamoto, R., et al., Nat. Cell Biol., 6(8):731-40 (2004); Hamamoto, R., et al., Cancer Sci., 97(2):113-8 (2006); Van Aller, G. S., et al., Epigenetics, 7(4):340-3 (2012); Liu, C., et al., J. Natl. Cancer Inst., 105(22):1719-28 (2013); Mazur, P. K., et al., Nature, 510(7504):283-7 (2014)).

Genetic knockdown of SMYD3 leads to a decrease in proliferation of a variety of cancer cell lines (Hamamoto, R., et al., Nat. Cell Biol., 6(8):731-40 (2004); Hamamoto, R., et al., Cancer Sci., 97(2):113-8 (2006); Van Aller, G. S., et al., Epigenetics, 7(4):340-3 (2012); Liu, C., et al., J. Natl. Cancer Inst., 105(22):1719-28 (2013); Mazur, P. K., et al., Nature, 510(7504):283-7 (2014)). Several studies employing RNAi-based technologies have shown that ablation of SMYD3 in hepatocellular carcinoma cell lines greatly reduces cell viability and that its pro-survival role is dependent on its catalytic activity (Hamamoto, R., et al., Nat. Cell Biol., 6(8):731-40 (2004); Van Aller, G. S., et al., Epigenetics, 7(4):340-3 (2012)). Moreover, SMYD3 has also been shown to be a critical mediator of transformation resulting from gain of function mutations in the oncogene, KRAS for both pancreatic and lung adenocarcinoma in mouse models. The dependence of KRAS on SMYD3 was also shown to be dependent on its catalytic activity (Mazur, P. K., et al., Nature, 510(7504):283-7 (2014)). SMYD3 function has also been implicated in colerectal cancers and RNAi mediated knockdown of SMYD3 has been shown to impair colerectal cell proliferation. (Peserico et al., Cell Physiol. 2015 Feb. 28. doi: 10.1002/jcp.24975. [Epub ahead of print]).

Furthermore, SMYD3 function has also been shown to play a role in immunology and development. For instance, de Almeida reported that SMYD3 plays a role in generation of inducible regulatory T cells (iTreg) cells. In a mouse model of respiratory syncytial virus (RSV) infection, a model in which iTreg cells have a critical role in regulating lung pathogenesis, SMYD3−/− mice demonstrated exacerbation of RSV-induced disease related to enhanced proinflammatory responses and worsened pathogenesis within the lung (de Almeida et al. Mucosal Immunol. 2015 Feb. 11. doi: 10.1038/mi.2015.4. [Epub ahead of print]). In addition, as to development, Proserpio et al. have shown the importance of SMYD3 in the regulation of skeletal muscle atrophy (Proserpio et al. Genes Dev. 2013 Jun. 1; 27(11):1299-312), while Fujii et al. have elucidated the role of SMYD3 in cardiac and skeletal muscle development (Fujii et al. PLoS One. 2011; 6(8):e23491).

SMYD2 (SET and MYND domain-containing protein 2) was first characterized as protein that is a member of a sub-family of SET domain containing proteins which catalyze the site-specific transfer of methyl groups onto substrate proteins. SMYD2 was initially shown to have methyltransferase activity towards lysine 36 on histone H3 (H3K36) but has subsequently been shown to have both histone and non-histone methyltrasferase activity.

SMYD2 has been implicated in the pathogenesis of multiple cancers. It has been shown to be over-expressed, compared to matched normal samples, in tumors of the breast, cervix, colon, kidney, liver, head and neck, skin, pancreas, ovary, esophagus and prostate, as well as hematologic malignancies such as AML, B- and T-ALL, CLL and MCL, suggesting a role for SMYD2 in the biology of these cancers. More specifically, studies using genetic knock-down of SMYD2 have demonstrated anti-proliferative effects in esophageal squamous cell carcinoma (ESCC), bladder carcinoma and cervical carcinoma cell lines. (See e.g., Komatsu et al., Carcinogenesis 2009, 30, 1139, and Cho et al., Neoplasia. 2012 June; 14(6):476-86). Moreover, high expression of SMYD2 has been shown to be a poor prognostic factor in both ESCC and pediatric ALL. (See e.g., Komatsu et al. Br J Cancer. 2015 Jan. 20; 112(2):357-64, and Sakamoto et al., Leuk Res. 2014 April; 38(4):496-502). Recently, Nguyen et al., have shown that a small molecule inhibitor of SMYD2 (LLY-507) inhibited the proliferation of several esophageal, liver and breast cancer cell lines in a dose-dependent manner. (Nguyen et al. J Biol Chem. 2015 Mar. 30. pii: jbc.M114.626861. [Epub ahead of print]).

SMYD2 has also been implicated in immunology. For instance, Xu et al. have shown that SMYD2 is a negative regulator of macrophage activation by suppressing Interleukin-6 and TNF-alpha production. (Xu et al., J Biol Chem. 2015 Feb. 27; 290(9):5414-23).

In one aspect, the present disclosure provides a method of treating cancer in a patient comprising administering a therapeutically effective amount of a Compound of the Disclosure. While not being limited to a specific mechanism, in some embodiemtns, Compounds of the Disclosure can treat cancer by inhibiting SMYD proteins, such as SMYD3 and SMYD2. Examples of treatable cancers include, but are not limited to, adrenal cancer, acinic cell carcinoma, acoustic neuroma, acral lentigious melanoma, acrospiroma, acute eosinophilic leukemia, acute erythroid leukemia, acute lymphoblastic leukemia, acute megakaryoblastic leukemia, acute monocytic leukemia, acute promyelocytic leukemia, adenocarcinoma, adenoid cystic carcinoma, adenoma, adenomatoid odontogenic tumor, adenosquamous carcinoma, adipose tissue neoplasm, adrenocortical carcinoma, adult T-cell leukemia/lymphoma, aggressive NK-cell leukemia, AIDS-related lymphoma, alveolar rhabdomyosarcoma, alveolar soft part sarcoma, ameloblastic fibroma, anaplastic large cell lymphoma, anaplastic thyroid cancer, angioimmunoblastic T-cell lymphoma, angiomyolipoma, angiosarcoma, astrocytoma, atypical teratoid rhabdoid tumor, B-cell chronic lymphocytic leukemia, B-cell prolymphocytic leukemia, B-cell lymphoma, basal cell carcinoma, biliary tract cancer, bladder cancer, blastoma, bone cancer, Brenner tumor, Brown tumor, Burkitt's lymphoma, breast cancer, brain cancer, carcinoma, carcinoma in situ, carcinosarcoma, cartilage tumor, cementoma, myeloid sarcoma, chondroma, chordoma, choriocarcinoma, choroid plexus papilloma, clear-cell sarcoma of the kidney, craniopharyngioma, cutaneous T-cell lymphoma, cervical cancer, colorectal cancer, Degos disease, desmoplastic small round cell tumor, diffuse large B-cell lymphoma, dysembryoplastic neuroepithelial tumor, dysgerminoma, embryonal carcinoma, endocrine gland neoplasm, endodermal sinus tumor, enteropathy-associated T-cell lymphoma, esophageal cancer, fetus in fetu, fibroma, fibrosarcoma, follicular lymphoma, follicular thyroid cancer, ganglioneuroma, gastrointestinal cancer, germ cell tumor, gestational choriocarcinoma, giant cell fibroblastoma, giant cell tumor of the bone, glial tumor, glioblastoma multiforme, glioma, gliomatosis cerebri, glucagonoma, gonadoblastoma, granulosa cell tumor, gynandroblastoma, gallbladder cancer, gastric cancer, hairy cell leukemia, hemangioblastoma, head and neck cancer, hemangiopericytoma, hematological malignancy, hepatoblastoma, hepatosplenic T-cell lymphoma, Hodgkin's lymphoma, non-Hodgkin's lymphoma, invasive lobular carcinoma, intestinal cancer, kidney cancer, laryngeal cancer, lentigo maligna, lethal midline carcinoma, leukemia, leydig cell tumor, liposarcoma, lung cancer, lymphangioma, lymphangiosarcoma, lymphoepithelioma, lymphoma, acute lymphocytic leukemia, acute myelogeous leukemia, chronic lymphocytic leukemia, liver cancer, small cell lung cancer, non-small cell lung cancer, MALT lymphoma, malignant fibrous histiocytoma, malignant peripheral nerve sheath tumor, malignant triton tumor, mantle cell lymphoma, marginal zone B-cell lymphoma, mast cell leukemia, mediastinal germ cell tumor, medullary carcinoma of the breast, medullary thyroid cancer, medulloblastoma, melanoma, meningioma, merkel cell cancer, mesothelioma, metastatic urothelial carcinoma, mixed Mullerian tumor, mucinous tumor, multiple myeloma, muscle tissue neoplasm, mycosis fungoides, myxoid liposarcoma, myxoma, myxosarcoma, nasopharyngeal carcinoma, neurinoma, neuroblastoma, neurofibroma, neuroma, nodular melanoma, ocular cancer, oligoastrocytoma, oligodendroglioma, oncocytoma, optic nerve sheath meningioma, optic nerve tumor, oral cancer, osteosarcoma, ovarian cancer, Pancoast tumor, papillary thyroid cancer, paraganglioma, pinealoblastoma, pineocytoma, pituicytoma, pituitary adenoma, pituitary tumor, plasmacytoma, polyembryoma, precursor T-lymphoblastic lymphoma, primary central nervous system lymphoma, primary effusion lymphoma, preimary peritoneal cancer, prostate cancer, pancreatic cancer, pharyngeal cancer, pseudomyxoma periotonei, renal cell carcinoma, renal medullary carcinoma, retinoblastoma, rhabdomyoma, rhabdomyosarcoma, Richter's transformation, rectal cancer, sarcoma, Schwannomatosis, seminoma, Sertoli cell tumor, sex cord-gonadal stromal tumor, signet ring cell carcinoma, skin cancer, small blue round cell tumors, small cell carcinoma, soft tissue sarcoma, somatostatinoma, soot wart, spinal tumor, splenic marginal zone lymphoma, squamous cell carcinoma, synovial sarcoma, Sezary's disease, small intestine cancer, squamous carcinoma, stomach cancer, T-cell lymphoma, testicular cancer, thecoma, thyroid cancer, transitional cell carcinoma, throat cancer, urachal cancer, urogenital cancer, urothelial carcinoma, uveal melanoma, uterine cancer, verrucous carcinoma, visual pathway glioma, vulvar cancer, vaginal cancer, Waldenstrom's macroglobulinemia, Warthin's tumor, and Wilms' tumor.

In another embodiment, the cancer is breast, cervix, colon, kidney, liver, head and neck, skin, pancreas, ovary, esophagus, or prostate cancer.

In another embodiment, the cancer is a hematologic malignancy such as acute myeloid leukemia (AML), B- and T-acute lymphoblastic leukemia (ALL), chronic lymphocytic leukemia (CLL), or mantle cell lymphoma (MCL).

In another embodiment, the cancer is esophageal squamous cell carcinoma (ESCC), bladder carcinoma, or cervical carcinoma.

In another embodiment, the cancer is a leukemia, for example a leukemia selected from acute monocytic leukemia, acute myelogenous leukemia, chronic myelogenous leukemia, chronic lymphocytic leukemia and mixed lineage leukemia (MLL). In another embodiment the cancer is NUT-midline carcinoma. In another embodiment the cancer is multiple myeloma. In another embodiment the cancer is a lung cancer such as small cell lung cancer (SCLC). In another embodiment the cancer is a neuroblastoma. In another embodiment the cancer is Burkitt's lymphoma. In another embodiment the cancer is cervical cancer. In another embodiment the cancer is esophageal cancer. In another embodiment the cancer is ovarian cancer. In another embodiment the cancer is colorectal cancer. In another embodiment, the cancer is prostate cancer. In another embodiment, the cancer is breast cancer.

In another embodiment, the present disclosure provides a therapeutic method of modulating protein methylation, gene expression, cell proliferation, cell differentiation and/or apoptosis in vivo in the cancers mentioned above by administering a therapeutically effective amount of a Compound of the Disclosure to a subject in need of such therapy.

Compounds of the Disclosure can be administered to a mammal in the form of a raw chemical without any other components present. Compounds of the Disclosure can also be administered to a mammal as part of a pharmaceutical composition containing the compound combined with a suitable pharmaceutically acceptable carrier. Such a carrier can be selected from pharmaceutically acceptable excipients and auxiliaries. The term “pharmaceutically acceptable carrier” or “pharmaceutically acceptable vehicle” encompasses any of the standard pharmaceutical carriers, solvents, surfactants, or vehicles. Suitable pharmaceutically acceptable vehicles include aqueous vehicles and nonaqueous vehicles. Standard pharmaceutical carriers and their formulations are described in Remington's Pharmaceutical Sciences, Mack Publishing Co., Easton, Pa., 19th ed. 1995.

Pharmaceutical compositions within the scope of the present disclosure include all compositions where a Compound of the Disclosure is combined with one or more pharmaceutically acceptable carriers. In one embodiment, the Compound of the Disclosure is present in the composition in an amount that is effective to achieve its intended therapeutic purpose. While individual needs may vary, a determination of optimal ranges of effective amounts of each compound is within the skill of the art. Typically, a Compound of the Disclosure can be administered to a mammal, e.g., a human, orally at a dose of from about 0.0025 to about 1500 mg per kg body weight of the mammal, or an equivalent amount of a pharmaceutically acceptable salt or solvate thereof, per day to treat the particular disorder. A useful oral dose of a Compound of the Disclosure administered to a mammal is from about 0.0025 to about 50 mg per kg body weight of the mammal, or an equivalent amount of the pharmaceutically acceptable salt or solvate thereof. For intramuscular injection, the dose is typically about one-half of the oral dose.

A unit oral dose may comprise from about 0.01 mg to about 1 g of the Compound of the Disclosure, e.g., about 0.01 mg to about 500 mg, about 0.01 mg to about 250 mg, about 0.01 mg to about 100 mg, 0.01 mg to about 50 mg, e.g., about 0.1 mg to about 10 mg, of the compound. The unit dose can be administered one or more times daily, e.g., as one or more tablets or capsules, each containing from about 0.01 mg to about 1 g of the compound, or an equivalent amount of a pharmaceutically acceptable salt or solvate thereof.

A pharmaceutical composition of the present disclosure can be administered to any patient that may experience the beneficial effects of a Compound of the Disclosure. Foremost among such patients are mammals, e.g., humans and companion animals, although the disclosure is not intended to be so limited. In one embodiment, the patient is a human.

A pharmaceutical composition of the present disclosure can be administered by any means that achieves its intended purpose. For example, administration can be by the oral, parenteral, subcutaneous, intravenous, intramuscular, intraperitoneal, transdermal, intranasal, transmucosal, rectal, intravaginal or buccal route, or by inhalation. The dosage administered and route of administration will vary, depending upon the circumstances of the particular subject, and taking into account such factors as age, gender, health, and weight of the recipient, condition or disorder to be treated, kind of concurrent treatment, if any, frequency of treatment, and the nature of the effect desired.

In one embodiment, a pharmaceutical composition of the present disclosure can be administered orally. In another embodiment, a pharmaceutical composition of the present disclosure can be administered orally and is formulated into tablets, dragees, capsules, or an oral liquid preparation. In one embodiment, the oral formulation comprises extruded multiparticulates comprising the Compound of the Disclosure.

Alternatively, a pharmaceutical composition of the present disclosure can be administered rectally, and is formulated in suppositories.

Alternatively, a pharmaceutical composition of the present disclosure can be administered by injection.

Alternatively, a pharmaceutical composition of the present disclosure can be administered transdermally.

Alternatively, a pharmaceutical composition of the present disclosure can be administered by inhalation or by intranasal or transmucosal administration.

Alternatively, a pharmaceutical composition of the present disclosure can be administered by the intravaginal route.

A pharmaceutical composition of the present disclosure can contain from about 0.01 to 99 percent by weight, e.g., from about 0.25 to 75 percent by weight, of a Compound of the Disclosure, e.g., about 1%, about 5%, about 10%, about 15%, about 20%, about 25%, about 30%, about 35%, about 40%, about 45%, about 50%, about 55%, about 60%, about 65%, about 70%, or about 75% by weight of a Compound of the Disclosure.

A pharmaceutical composition of the present disclosure is manufactured in a manner which itself will be known in view of the instant disclosure, for example, by means of conventional mixing, granulating, dragee-making, dissolving, extrusion, or lyophilizing processes. Thus, pharmaceutical compositions for oral use can be obtained by combining the active compound with solid excipients, optionally grinding the resulting mixture and processing the mixture of granules, after adding suitable auxiliaries, if desired or necessary, to obtain tablets or dragee cores.

Suitable excipients include fillers such as saccharides (for example, lactose, sucrose, mannitol or sorbitol), cellulose preparations, calcium phosphates (for example, tricalcium phosphate or calcium hydrogen phosphate), as well as binders such as starch paste (using, for example, maize starch, wheat starch, rice starch, or potato starch), gelatin, tragacanth, methyl cellulose, hydroxypropylmethylcellulose, sodium carboxymethylcellulose, and/or polyvinyl pyrrolidone. If desired, one or more disintegrating agents can be added, such as the above-mentioned starches and also carboxymethyl-starch, cross-linked polyvinyl pyrrolidone, agar, or alginic acid or a salt thereof, such as sodium alginate.

Auxiliaries are typically flow-regulating agents and lubricants such as, for example, silica, talc, stearic acid or salts thereof (e.g., magnesium stearate or calcium stearate), and polyethylene glycol. Dragee cores are provided with suitable coatings that are resistant to gastric juices. For this purpose, concentrated saccharide solutions can be used, which may optionally contain gum arabic, talc, polyvinyl pyrrolidone, polyethylene glycol and/or titanium dioxide, lacquer solutions and suitable organic solvents or solvent mixtures. In order to produce coatings resistant to gastric juices, solutions of suitable cellulose preparations such as acetylcellulose phthalate or hydroxypropylmethyl-cellulose phthalate can be used. Dye stuffs or pigments can be added to the tablets or dragee coatings, for example, for identification or in order to characterize combinations of active compound doses.

Examples of other pharmaceutical preparations that can be used orally include push-fit capsules made of gelatin, or soft, sealed capsules made of gelatin and a plasticizer such as glycerol or sorbitol. The push-fit capsules can contain a compound in the form of granules, which can be mixed with fillers such as lactose, binders such as starches, and/or lubricants such as talc or magnesium stearate and, optionally, stabilizers, or in the form of extruded multiparticulates. In soft capsules, the active compounds are preferably dissolved or suspended in suitable liquids, such as fatty oils or liquid paraffin. In addition, stabilizers can be added.

Possible pharmaceutical preparations for rectal administration include, for example, suppositories, which consist of a combination of one or more active compounds with a suppository base. Suitable suppository bases include natural and synthetic triglycerides, and paraffin hydrocarbons, among others. It is also possible to use gelatin rectal capsules consisting of a combination of active compound with a base material such as, for example, a liquid triglyceride, polyethylene glycol, or paraffin hydrocarbon.

Suitable formulations for parenteral administration include aqueous solutions of the active compound in a water-soluble form such as, for example, a water-soluble salt, alkaline solution, or acidic solution. Alternatively, a suspension of the active compound can be prepared as an oily suspension. Suitable lipophilic solvents or vehicles for such as suspension may include fatty oils (for example, sesame oil), synthetic fatty acid esters (for example, ethyl oleate), triglycerides, or a polyethylene glycol such as polyethylene glycol-400 (PEG-400). An aqueous suspension may contain one or more substances to increase the viscosity of the suspension, including, for example, sodium carboxymethyl cellulose, sorbitol, and/or dextran. The suspension may optionally contain stabilizers.

In another embodiment, the present disclosure provides kits which comprise a Compound of the Disclosure (or a composition comprising a Compound of the Disclosure) packaged in a manner that facilitates their use to practice methods of the present disclosure. In one embodiment, the kit includes a Compound of the Disclosure (or a composition comprising a Compound of the Disclosure) packaged in a container, such as a sealed bottle or vessel, with a label affixed to the container or included in the kit that describes use of the compound or composition to practice the method of the disclosure. In one embodiment, the compound or composition is packaged in a unit dosage form. The kit further can include a device suitable for administering the composition according to the intended route of administration.

General Synthesis of Compounds

Compounds of the Disclosure are prepared using methods known to those skilled in the art in view of this disclosure, or by the illustrative methods shown in the General Schemes below. In the General Schemes, R¹, R², R³, and Z of Formulae A-C are as defined in connection with Formula VII, unless otherwise indicated. In the General Schemes, suitable protecting can be employed in the synthesis, for example, when Z is (amino)alkyl or any other group that may require protection. (See, Wuts, P. G. M.; Greene, T. W., “Greene's Protective Groups in Organic Synthesis”, 4th Ed., J. Wiley & Sons, N Y, 2007).

Compound A is converted to compound B (i.e, a compound having Formula VII, wherein X is —S(═O)₂—) by coupling with a suitable sulfonyl chloride (Z—SO₂Cl) in the presence of a suitable base such as TEA or DIPEA in a suitable solvent such as dichloromethane, acetonitrile, or DMF.

Compound A was converted to compound C by coupling with a suitable carboxylic acid (ZCO₂H) in the presence of a suitable coupling reagent such as HATU or HOBT in the presence of a suitable base such as TEA or DIPEA in a suitable solvent such as DMF. Compound A can also be converted to compound C by coupling with a suitable acid chloride (ZCOCl) in the presence of a suitable base such as TEA or DIPEA in the presence of a suitable solvent such as dichloromethane, acetonitrile or DMF.

EXAMPLES General Synthetic Methods

General methods and experimental procedures for preparing and characterizing compounds of Tables 1 and 2 are set forth in the general schemes above and the examples below. Wherever needed, reactions were heated using conventional hotplate apparatus or heating mantle or microwave irradiation equipment. Reactions were conducted with or without stirring, under atmospheric or elevated pressure in either open or closed vessels. Reaction progress was monitored using conventional techniques such as TLC, HPLC, UPLC, or LCMS using instrumentation and methods described below. Reactions were quenched and crude compounds isolated using conventional methods as described in the specific examples provided. Solvent removal was carried out with or without heating, under atmospheric or reduced pressure, using either a rotary or centrifugal evaporator.

Compound purification was carried out as needed using a variety of traditional methods including, but not limited to, preparative chromatography under acidic, neutral, or basic conditions using either normal phase or reverse phase HPLC or flash columns or Prep-TLC plates. Compound purity and mass confirmations were conducted using standard HPLC and/or UPLC and/or MS spectrometers and/or LCMS and/or GC equipment (i.e., including, but not limited to the following instrumentation: Waters Alliance 2695 with 2996 PDA detector connected with ZQ detector and ESI source; Shimadzu LDMS-2020; Waters Acquity H Class with PDA detector connected with SQ detector and ESI source; Agilent 1100 Series with PDA detector; Waters Alliance 2695 with 2998 PDA detector; AB SCIEX API 2000 with ESI source; Agilent 7890 GC).

Compound structure confirmations were carried out using standard 300 or 400 MHz NMR spectrometers with nOe's conducted whenever necessary.

The following abbreviations are used herein:

Abbreviation Meaning ACN acetonitrile atm. atmosphere DCM dichloromethane DHP dihydropyran DIBAL diisobutyl aluminum hydride DIEA diisopropyl ethylamine DMF dimethyl formamide DMF-DMA dimethyl formamide dimethyl acetal DMSO dimethyl sulfoxide Dppf 1,1′- bis(diphenylphosphino)ferrocene EA ethyl acetate ESI electrospray ionization EtOH Ethanol FA formic acid GC gas chromatography H hour Hex hexanes HMDS hexamethyl disilazide HPLC high performance liquid chromatography IPA Isopropanol LCMS liquid chromatography/mass spectrometry MeOH Methanol Min Minutes NBS N-bromo succinimide NCS N-chloro succinimide NIS N-iodo succinimide NMR nuclear magnetic resonance nOe nuclear Overhauser effect Prep. Preparative PTSA para-toluene sulfonic acid Rf retardation factor rt room temperature RT retention time sat. Saturated SGC silica gel chromatography TBAF tetrabutyl ammonium fluoride TEA Triethylamine TFA trifluoroacetic acid THF Tetrahydrofuran TLC thin layer chromatography UPLC ultra performance liquid chromatography

Example 1 Synthesis of 5-cyclopropylisoxazole-3-carboxylic acid

Step 1: Synthesis of ethyl 4-cyclopropyl-2,4-dioxobutanoate

Into a 10-L 3-necked round-bottom flask purged and maintained with an inert atmosphere of nitrogen Na (164 g, 1.20 equiv) was added in portions to ethanol (5 L). A solution of (CO₂Et)₂ (869 g, 1.00 equiv) and 1-cyclopropylethan-1-one (500 g, 5.94 mol, 1.00 equiv) was added dropwise with stirring at 0-20° C. The resulting solution was stirred for 1 h at 20-30° C. and then for an additional 1 h at 80° C. The resulting solution was diluted with 15 L of H₂O. The pH was adjusted to 2 with hydrochloric acid (12N). The resulting mixture was extracted with ethyl acetate and the organic layers combined and washed with NaHCO₃ (sat. aq.). The extract was concentrated under vacuum yielding 820 g (crude) of ethyl 4-cyclopropyl-2,4-dioxobutanoate as yellow oil. TLC (ethyl acetate/petroleum ether=1/5): Rf=0.5.

Step 2: Synthesis of ethyl 5-cyclopropylisoxazole-3-carboxylate

Into a 10 L round-bottom flask, was placed a solution of ethyl 4-cyclopropyl-2,4-dioxobutanoate (177 g) in ethanol (1.1 L) and NH₂OH—HCl (200 g). The resulting solution was stirred for 1 h at 20-30° C. The resulting solution was allowed to react, with stirring, for an additional 1 h at 80° C. The resulting mixture was concentrated under vacuum. The residue was purified on a silica gel column with ethyl acetate/petroleum ether (1/10). This resulted in 143 g (the two step yield was 66.3%) of ethyl 5-cyclopropylisoxazole-3-carboxylate as a yellow oil. TLC (ethyl acetate/petroleum ether=1/5): Rf=0.2.

Step 3: Synthesis of 5-cyclopropylisoxazole-3-carboxylic acid

Into a 10-L round-bottom flask was placed ethyl 5-cyclopropylisoxazole-3-carboxylate (280 g, 1.55 mol, 1.00 equiv) and a solution of sodium hydroxide (74.3 g, 1.20 equiv) in water (4 L). The resulting solution was stirred for 1 h at room temperature. The resulting mixture was washed with ether. The pH value of the aqueous solution was adjusted to 2-3 with hydrochloric acid (12N). The resulting solution was extracted with ethyl acetate and the organic layers combined and concentrated under vacuum. This resulted in 220 g (93%) of 5-cyclopropylisoxazole-3-carboxylic acid as an off-white solid. ¹H-NMR (300 MHz CDCl₃): δ 8.42 (brs, 1H), 6.37 (s, 1H), 2.16-2.05 (m, 1H), 1.29-1.12 (m, 2H), 1.12-0.99 (m, 2H); LCMS m/z=153.9 [M+H]⁺.

Example 2 Synthesis of 5-cyclopropylisoxazole-3-carbonyl chloride

To a stirred solution of 5-cyclopropylisoxazole-3-carboxylic acid (0.750 g, 4.90 mmol) in DCM (5 ml) was added oxalyl chloride (1.68 ml, 19.60 mmol) and 2 drops of DMF. The reaction was stirred at RT 2 hr. After complete consumption of starting material, the solvent was removed under reduced pressure to obtain 5-cyclopropylisoxazole-3-carbonyl chloride as a residue (0.6 g, crude). The material was used without further purification.

Example 3 Synthesis of 5-cyclopropyl-N-(1-(piperidin-4-yl)ethyl)isoxazole-3-carboxamide hydrochloride (Cpd. No. 213

Step 1: Synthesis of tert-butyl 4-(methoxy(methyl)carbamoyl)piperidine-1-carboxylate

To a stirred solution of 1-(tert-butoxycarbonyl)piperidine-4-carboxylic acid (5.0 g, 21.7 mmol) in DMF (20 mL) was added HATU (12.39 g, 32.60 mmol) and diisopropylethylamine (18.94 ml, 108.6 mmol). The solution was stirred for 10 min at 0° C. After that N,O-dimethylhydroxylamine hydrochloride (2.12 g, 21.7 mmol) was added and stirred at RT for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl 4-(methoxy(methyl)carbamoyl)piperidine-1-carboxylate (4.3 g, 71%). LCMS: m/z=173.05 (M-Boc)⁺.

Step 2: Synthesis of tert-butyl 4-acetylpiperidine-1-carboxylate

To a stirred solution of tert-butyl 4-(methoxy(methyl)carbamoyl)piperidine-1-carboxylate (4.3 g, 15.8 mmol) in dry THF (20 mL) was added a solution of methyl magnesium bromide (20 mL, 23.71 mmol, 1.6 M in THF:toluene) at −78° C. and the reaction was stirred at −78° C. for 2 h and RT for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with saturated NH₄Cl solution and extracted with ethyl acetate. The organic layer was washed with brine, dried over Na₂SO₄ and concentrated under reduced pressure to a crude residue which was purified by column chromatography to afford tert-butyl 4-acetylpiperidine-1-carboxylate (2.8 g, 62%).

Step 3: Synthesis of tert-butyl 4-(1-aminoethyl)piperidine-1-carboxylate

To a stirred solution of compound tert-butyl 4-acetylpiperidine-1-(2.8 g, 9.68 mmol) in dry MeOH (6 mL) was added ammonium acetate (8.9 g, 16.2 mmol) and the reaction was stirred at RT for 15 min, sodium cyanoborohydride (2.43 g, 38.7 mmol) was then added. The reaction mixture was heated to reflux for 16 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with 0.5 M NaOH solution and extracted with ethyl acetate. The organic layer was washed with brine, dried over Na₂SO₄ and concentrated under reduced pressure to obtain a residue of tert-butyl 4-(1-aminoethyl)piperidine-1-carboxylate (2.1 g, crude). This was used in the next step without further purification. LCMS: m/z=191.25 (M-Boc)⁺.

Step 4: Synthesis of tert-butyl 4-(1-(5-cyclopropylisoxazole-3-carboxamido)ethyl)piperidine-1-carboxylate

To a stirred solution of 5-cyclopropylisoxazole-3-carboxylic acid (1.0 g, 6.5 mmol) in DMF (3 mL) was added HATU (3.72 g, 9.8 mmol) and diisopropylethylamine (3.5 ml, 19.6 mmol). The solution was stirred for 10 min at 0° C. tert-Butyl 4-(1-aminoethyl)piperidine-1-carboxylate (1.45 g, 6.5 mmol) was added and the reaction stirred at RT for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford compound tert-butyl 4-(1-(5-cyclopropylisoxazole-3-carboxamido)ethyl)piperidine-1-carboxylate (2.1 g, 84%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.44 (d, J=8.9 Hz, 1H), 6.46 (s, 1H), 3.98-3.90 (m, 2H), 3.79 (p, J=7.3 Hz, 1H), 2.53-2.47 (m, 2H), 2.19-2.16 (m, 1H), 1.6-1.58 (m, 3H), 1.38 (s, 9H), 1.18-0.86 (m, 9H); LCMS: m/z=386.25 (M+H)⁺.

Step 5: Synthesis of 5-cyclopropyl-N-(1-(piperidin-4-yl)ethyl)isoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl 4-(1-(5-cyclopropylisoxazole-3-carboxamido)ethyl)piperidine-1-carboxylate (2.1 g, 5.8 mmol) in dioxane (5 mL) was added 4 M dioxane:HCl (20 mL) at 0° C. and the reaction mixture was stirred at RT for 3 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure to obtain a crude residue which was purified by repeated washing with ether and pentane to obtain 5-cyclopropyl-N-(1-(piperidin-4-yl)ethyl)isoxazole-3-carboxamide hydrochloride (1.3 g, 86%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.95-8.86 (m, 1H), 8.54 (t, J=11.8 Hz, 2H), 6.49 (s, 1H), 3.91-3.77 (m, 1H), 3.24 (d, J=12.4 Hz, 2H), 2.88-2.66 (m, 2H), 2.18 (tt, J=8.4, 5.0 Hz, 1H), 1.86-1.60 (m, 3H), 1.44-1.27 (m, 2H), 1.15-1.03 (m, 5H), 0.95-0.84 (m, 2H); LCMS: m/z=264.20 (M+H)⁺.

Example 4 Synthesis of 5-cyclopropyl-N-(phenyl(piperidin-4-yl)methyl)isoxazole-3-carboxamide (Cpd. No. 49

Step 1: Synthesis of tert-butyl 4-benzoylpiperidine-1-carboxylate

To a stirred solution of tert-butyl 4-(methoxy(methyl)carbamoyl)piperidine-1-carboxylate (0.5 g, 1.83 mmol) in THF (1.5 mL) was added a 1M solution of phenyl magnesium bromide in THF (3.67 mL, 3.67 mmol) at 0° C. The reaction was stirred overnight at RT. The reaction completion was monitored by TLC and the reaction was quenched with ammonium chloride solution and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to a residue. The residue was purified by column chromatography to obtain tert-butyl 4-benzoylpiperidine-1-carboxylate (0.188 g, 35.5%) LCMS: m/z=190.1 (M+H)⁺.

Step 2: Synthesis of tert-butyl 4-(amino(phenyl)methyl)piperidine-1-carboxylate

To a solution of tert-butyl 4-benzoylpiperidine-1-carboxylate (0.188 g, 0.65 mmol) in MeOH (5 mL) was added ammonium acetate (0.6 g, 7.8 mmol). The reaction was stirred for 10 minutes at 25° C., then sodium cyanoborohydride (0.163 g, 2.59 mmol) was added. The reaction heated to 60° C. for 16 hours. The reaction completion was monitored by TLC and the reaction was quenched with 0.5N NaOH solution and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to a residue which was purified by column chromatography to obtain tert-butyl 4-(amino(phenyl)methyl)piperidine-1-carboxylate (0.2 g, 40%). LCMS: m/z=190.3 (M+H)⁺.

Step 3: Synthesis of tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidine-1-carboxylate

To a stirred solution of 5-cyclopropylisoxazole-3-carboxylic acid (0.1 g, 0.34 mmol) in DCM (5 ml) was added oxalyl chloride (0.2 ml, 0.68 mmol) and 2 drops of DMF. The reaction was stirred at RT 2 hr. After complete consumption of starting material, the solvent was removed under reduced pressure to obtain a residue. The residue was dissolved in DCM and cooled to 0° C. tert-Butyl 4-(amino(phenyl)methyl)piperidine-1-carboxylate was added (0.070 g, 0.41 mmol) in DCM (5 mL) followed by triethylamine (0.23 mL, 0.17 mmol). The reaction was stirred at RT for 1 hr. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with sodium bicarbonate and, extracted with DCM. The organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to obtain a residue which was purified by column chromatography to obtain tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidine-1-carboxylate (0.057 g, 50%) LCMS: m/z=326.23 (M+H)⁺.

Step 4: Synthesis of 5-cyclopropyl-N-(phenyl(piperidin-4-yl)methyl)isoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidine-1-carboxylate (0.057 g, 0.13 mmol) in dioxane (1 mL) at 0° C. was added 4 M dioxane:HCl (2 mL). The reaction was stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure and the residue was purified by washing with ether and pentane to obtain 5-cyclopropyl-N-(phenyl(piperidin-4-yl)methyl)isoxazole-3-carboxamide hydrochloride (0.028 g, 65%). ¹H NMR (400 MHz, DMSO-d₆) δ 9.21 (d, J=9.0 Hz, 1H), 8.70 (d, J=11.2 Hz, 1H), 8.36 (d, J=11.7 Hz, 1H), 7.46-7.37 (m, 2H), 7.39-7.22 (m, 3H), 6.47 (s, 1H), 4.71 (t, J=9.5 Hz, 1H), 3.22-3.13 (m, 2H), 2.77 (q, J=11.0, 10.1 Hz, 2H), 2.23-2.03 (m, 3H), 1.47-1.19 (m, 3H), 1.14-1.02 (m, 2H), 0.94-0.83 (m, 2H); LCMS: m/z=326.25 (M+H)⁺.

Example 5 Synthesis of N-(1-(1-((S)-2-amino-3-(4-hydroxyphenyl)propanoyl)piperidin-4-yl)ethyl)-5-cyclopropylisoxazole-3-carboxamide (Cpd. No. 211

Step 1: Synthesis of tert-butyl ((2S)-1-(4-(1-(5-cyclopropylisoxazole-3-carboxamido)ethyl)piperidin-1-yl)-3-(4-hydroxyphenyl)-1-oxopropan-2-yl)carbamate

To a stirred solution of (S)-2-((tert-butoxycarbonyl)amino)-3-(4-hydroxyphenyl) propanoic acid (0.188 g, 0.68 mmol) in DMF (2 mL) was added EDCI (0.191 g, 1.10 mmol), HOBt (0.135 g, 1.10 mmol), and triethylamine (0.3 mL, 2.27 mmol). The solution was stirred for 30 min at 0° C. 5-Cyclopropyl-N-(1-(piperidin-4-yl)ethyl)isoxazole-3-carboxamide hydrochloride (0.2 g, 0.66 mmol) was then added and the reaction stirred at rt overnight. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl ((2S)-1-(4-(1-(5-cyclopropylisoxazole-3-carboxamido)ethyl)piperidin-1-yl)-3-(4-hydroxyphenyl)-1-oxopropan-2-yl)carbamate (0.09 g, 25%). LCMS: m/z=428.05 (M-Boc)⁺.

Step 2: Synthesis of N-(1-(1-((S)-2-amino-3-(4-hydroxyphenyl)propanoyl)piperidin-4-yl)ethyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl ((2S)-1-(4-(1-(5-cyclopropylisoxazole-3-carboxamido)ethyl)piperidin-1-yl)-3-(4-hydroxyphenyl)-1-oxopropan-2-yl)carbamate (0.09 g, 0.17 mmol) in dioxane (1 mL) was added 4 M dioxane:HCl (5 mL) at 0° C. and the reaction mixture stirred at rt for 3 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure to obtain a crude residue which was purified by repeated washing with ether and pentane to obtain N-(1-(1-((S)-2-amino-3-(4-hydroxyphenyl)propanoyl)piperidin-4-yl)ethyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (0.020 g, 28%). ¹H NMR (400 MHz, DMSO-d₆) δ 9.44-9.35 (m, 1H), 8.46 (q, J=7.3 Hz, 1H), 8.12 (s, 3H), 6.99 (dd, J=17.3, 7.9 Hz, 2H), 6.75-6.66 (m, 2H), 6.46 (d, J=3.5 Hz, 1H), 4.52 (p, J=6.8, 6.2 Hz, 1H), 4.37 (d, J=12.8 Hz, 1H), 3.83-3.59 (m, 2H), 2.96-2.73 (m, 2H), 2.47-2.33 (m, 2H), 2.27-2.12 (m, 1H), 1.76-1.62 (m, 1H), 1.62-1.35 (m, 2H), 1.14-0.81 (m, 9H); LCMS: m/z=427.35 (M+H)⁺.

Example 6 Synthesis N—((S)-(1-((S)-2-aminopropanoyl)piperidin-4-yl)(phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (Cpd. No. 215) And N—((R)-(1-((S)-2-aminopropanoyl)piperidin-4-yl)(phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (Cpd. No. 216

Step 1: Synthesis of tert-butyl ((S)-1-(4-((S)-(5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate and tert-butyl ((S)-1-(4-((R)-(5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate

To a stirred solution of (S)-2-((tert-butoxycarbonyl)amino)propanoic acid (0.044 g, 0.230 mmol) in DMF (1 mL) was added HATU (0.131 g, 0.34 mmol) and diisopropyl ethylamine (0.12 mL, 0.69 mmol). The solution was stirred for 10 min at 0° C. Next, 5-cyclopropyl-N-(phenyl(piperidin-4-yl)methyl)isoxazole-3-carboxamide ((0.1 g, 0.277 mmol) was added and the reaction stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by preparative chiral HPLC to afford tert-butyl ((S)-1-(4-((S)-(5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate (0.13 g, 18%) and tert-butyl ((S)-1-(4-((R)-(5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate (0.12 g, 17.4%).

Step 2: Synthesis of N—((S)-(1-((S)-2-aminopropanoyl)piperidin-4-yl)(phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl ((S)-1-(4-((S)-(5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate (0.05 g, 0.126 mmol) in dioxane (1 mL) at 0° C. was added 4 M dioxane:HCl (3 mL). The reaction mixture was stirred at RT for 1 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material the solvent was removed under reduced pressure to obtain a crude residue. The material was purified by repeated washing with ether and pentane to obtain N—((S)-(1-((S)-2-aminopropanoyl)piperidin-4-yl)(phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (0.035 g, 50%). ¹H NMR (400 MHz, DMSO-d₆): δ 9.19 (dd, J=9.0, 6.3 Hz, 1H), 8.09 (s, 3H), 7.44-7.21 (m, 5H), 6.46 (s, 1H), 4.69 (q, J=10.0 Hz, 1H), 4.29 (s, 2H), 3.76 (d, J=13.7 Hz, 1H), 2.98-2.96 (m, 1H), 2.66-2.50 (m, 1H), 2.23-2.06 (m, 2H), 2.02-1.91 (m, 1H), 1.30 (d, J=6.8 Hz, 1H), 1.21 (dd, J=24.0, 9.9 Hz, 4H), 1.14-0.83 (m, 5H); LCMS: m/z=397.35 (M+H)⁺.

Step 2: Synthesis of N—((R)-(1-((S)-2-aminopropanoyl)piperidin-4-yl)(phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl ((S)-1-(4-((R)-(5-cyclopropylisoxazole-3-carboxamido)(phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate (0.06 g, 0.12 mmol) in dioxane (1 mL) at 0° C. was added 4 M dioxane:HCl (3 mL). The reaction mixture was stirred at RT for 1 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material the solvent was removed under reduced pressure to obtain a crude residue. The material was purified by repeated washing with ether and pentane to obtain N—((R)-(1-((S)-2-aminopropanoyl)piperidin-4-yl)(phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide (0.02 g, 30%). ¹H NMR (400 MHz, DMSO-d₆): δ 9.20 (t, J=8.8 Hz, 1H), 8.08 (s, 3H), 7.46-7.21 (m, 5H), 6.46 (d, J=1.5 Hz, 1H), 4.7-4.68 (m, 1H), 4.35-4.32 (m, 2H), 3.90 (d, J=13.7 Hz, 1H), 3.07-2.87 (m, 1H), 2.66-2.51 (m, 1H), 2.23-2.06 (m, 2H), 1.95 (d, J=11.4 Hz, 1H), 1.36-1.00 (m, 8H), 1.01-0.82 (m, 2H); LCMS: m/z=397.22 (M+H)⁺.

Example 7 Synthesis of N-((1-((S)-2-aminopropanoyl)piperidin-4-yl)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (Cpd. No. 205

Step 1: Synthesis of tert-butyl 4-(hydroxy(3-(methoxycarbonyl)phenyl)methyl) piperidine-1-carboxylate

To a stirred solution of methyl 3-iodobenzoate (3.0 g, 11.45 mmol) in anhydrous THF (100 mL) was added isopropyl magnesium chloride (6.27 mL, 12.59 mmol, 2M solution in THF) at −40° C. tert-Butyl 4-formylpiperidine-1-carboxylate (2.68 g, 12.59 mmol) was added. The reaction was stirred at rt overnight. The reaction was quenched with saturated NH₄Cl solution and extracted with ethyl acetate. The organic layer was washed with brine, dried over Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl 4-(hydroxy(3-(methoxycarbonyl)phenyl)methyl)piperidine-1-carboxylate (2.91 g, 73%). LCMS: m/z=350.15 (M+H)⁺.

Step 2: Synthesis of tert-butyl 4-(3-(methoxycarbonyl)benzoyl)piperidine-1-carboxylate

To a stirred solution of 4-(hydroxy(3-(methoxycarbonyl)phenyl) methyl)piperidine-1-carboxylate (1.9 g, 5.44 mmol) in DCM (30 mL) was added Dess Martin periodane (3.0 g, 7.07 mmol) at 0° C. The reaction mixture was stirred at rt for 1 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched by the addition of a mixture of saturated solution of Na₂S₂O₃ (10 mL) and NaHCO₃ (10 mL). The organic layer was extracted, dried over anhydrous Na₂SO₄, concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl 4-(3-(methoxycarbonyl)benzoyl)piperidine-1-carboxylate (1.78 g, 94%). LCMS: m/z=348.15 (M+H)⁺.

Step 3: Synthesis of tert-butyl 4-(amino(3-(methoxycarbonyl)phenyl)methyl)piperidine-1-carboxylate

To a stirred solution of tert-butyl 4-(3-(methoxycarbonyl)benzoyl)piperidine-1-carboxylate (1.5 g, 4.32 mmol) in methanol (30 mL) at 0° C. was added ammonium acetate (4.0 g, 51.8 mmol) followed by portionwise addition of sodium cyanoborohydride (1.0 g, 17.2 mmol). The reaction mixture was heated to reflux at 80° C. for 12 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with dilute HCl solution and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried over Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl 4-(amino(3-(methoxycarbonyl)phenyl)methyl)piperidine-1-carboxylate (1.05 g, 70%).

Step 4: Synthesis of tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)(3-(methoxycarbonyl)phenyl)methyl)piperidine-1-carboxylate

To a stirred solution of 5-cyclopropylisoxazole-3-carboxylic acid (0.65 g, 1.86 mmol) in DMF (10 mL) was added HATU (1.0 g, 2.8 mmol) and diisopropylethylamine (1.2 ml, 7.44 mmol). The reaction mixture was stirred for 10 min at 0° C. and then tert-butyl 4-(amino(3-(methoxycarbonyl)phenyl)methyl)piperidine-1-carboxylate (0.284 g, 1.86 mmol) was added. The reaction mixture was stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried over Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)(3-(methoxycarbonyl) phenyl)methyl)piperidine-1-carboxylate (0.789 g, 95%).

Step 5: Synthesis of 3-((1-(tert-butoxycarbonyl)piperidin-4-yl)(5-cyclopropylisoxazole-3-carboxamido)methyl)benzoic acid

To a stirred solution of tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)(3-(methoxycarbonyl)phenyl)methyl)piperidine-1-carboxylate (0.77 g, 1.59 mmol) in THF:MeOH:H₂O (1:1:1, 15 mL) was added lithium hydroxide (0.133 g, 3.18 mmol). The reaction mixture was then stirred at rt for 12 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material the solvent was removed under reduced pressure to obtain a crude residue. The residue was taken up in MeOH and acidified with dilute HCl to pH=2. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure to obtain 3-((1-(tert-butoxycarbonyl)piperidin-4-yl)(5-cyclopropylisoxazole-3-carboxamido)methyl)benzoic acid (0.580 g, crude).

Step 6: Synthesis of tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)piperidine-1-carboxylate

To a stirred solution of 3-((1-(tert-butoxycarbonyl)piperidin-4-yl)(5-cyclopropylisoxazole-3-carboxamido)methyl)benzoic acid (0.5 g, 1.06 mmol) in DMF (3 mL) was added HATU (0.607 g, 1.59 mmol) and diispropylethylamine (0.63 mL, 3.73 mmol). The solution was stirred for 10 min at 0° C. Then pyridin-3-amine (0.14 g, 1.49 mmol) was added and stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl-4-((5-cyclopropylisoxazole-3-carboxamido)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)piperidine-1-carboxylate (0.445 g, 76%). LCMS: m/z=446.4 (M-Boc)⁺.

Step 7: Synthesis of 5-cyclopropyl-N-(piperidin-4-yl(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)isoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl-4-((5-cyclopropylisoxazole-3-carboxamido)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)piperidine-1-carboxylate (0.445 g, 0.81 mmol) in dioxane (4 mL) at 0° C. was added 4 M dioxane:HCl (8 mL) and the reaction mixture stirred at rt for 3 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material the solvent was removed under reduced pressure to obtain a crude residue which was purified by repeated washing with ether and pentane to obtain 5-cyclopropyl-N-(piperidin-4-yl(3-(pyridin-3-ylcarbamoyl)phenyl)methyl) isoxazole-3-carboxamide hydrochloride (0.380 g, 96%). LCMS: m/z=446.25 (M+H)⁺.

Step 8: Synthesis of tert-butyl ((2S)-1-(4-((5-cyclopropylisoxazole-3-carboxamido)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate

To a stirred solution of (S)-2-((tert-butoxycarbonyl)amino)propanoic acid (0.089 g, 0.474 mmol) in DMF (3 mL) was added HATU (0.225 g, 0.592 mmol) and diispropylethylamine (0.23 mL, 1.38 mmol). The solution was stirred for 10 min at 0° C. Next 5-cyclopropyl-N-(piperidin-4-yl(3-(pyridin-3-ylcarbamoyl)phenyl)methyl) isoxazole-3-carboxamide hydrochloride (0.19 g, 0.395 mmol) was added and the reaction stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl ((2S)-1-(4-((5-cyclopropylisoxazole-3-carboxamido)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate (0.170 g, 83%). LCMS: m/z=517.4 (M-Boc)⁺.

Step 9: Synthesis of N-((1-((S)-2-aminopropanoyl)piperidin-4-yl)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl ((2S)-1-(4-((5-cyclopropylisoxazole-3-carboxamido)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)piperidin-1-yl)-1-oxopropan-2-yl)carbamate (0.170 g, 0.275 mmol) in dioxane (3 mL) at 0° C. was added 4 M dioxane:HCl (2 mL) and the reaction mixture stirred at rt for 3 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material the solvent was removed under reduced pressure to obtain a crude residue which was purified by repeated washing with ether and pentane to obtain N-((1-((S)-2-aminopropanoyl)piperidin-4-yl)(3-(pyridin-3-ylcarbamoyl)phenyl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (0.135 g, 83%). ¹H NMR (400 MHz, DMSO-d₆)(mixture of diastereomers): δ 11.09 (d, J=14.5 Hz, 1H), 9.38-9.24 (m, 2H), 8.64 (d, J=8.0 Hz, 1H), 8.55 (dd, J=5.4, 1.4 Hz, 1H), 8.17-8.09 (m, 4H), 8.03-7.94 (m, 1H), 7.84 (dd, J=8.4, 5.2 Hz, 1H), 7.71 (dd, J=7.7, 5.0 Hz, 1H), 7.56 (td, J=7.7, 4.2 Hz, 1H), 6.51 (d, J=3.7 Hz, 1H), 4.90-4.74 (m, 1H), 4.48-4.32 (m, 1H), 4.35-4.23 (m, 2H), 3.92 (d, J=13.6 Hz, 1H), 3.79 (dd, J=13.8, 9.2 Hz, 1H), 3.69-3.53 (m, 1H), 3.18-2.91 (m, 2H), 2.67-2.51 (m, 2H), 2.19-2.17 (m, 3H), 1.97 (d, J=12.6 Hz, 1H), 1.35-0.97 (m, 2H), 0.95-0.82 (m, 2H); LCMS: m/z=517.35 (M+H)⁺.

Example 8 Synthesis of 5-cyclopropyl-N-(piperidin-4-ylmethyl)isoxazole-3-carboxamide hydrochloride (Cpd. No. 4)

Step 1: Synthesis of tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)methyl) piperidine-1-carboxylate

To a stirred solution of tert-butyl 4-(aminomethyl)piperidine-1-carboxylate (0.514 g, 2.43 mmol) in DCM (10 mL) was added triethylamine (0.68 mL, 4.87 mmol) and the solution was stirred at 0° C. for 10 min. 5-Cyclopropylisoxazole-3-carbonyl chloride (0.6 g, 3.166 mmol) in DCM (5 mL) was added dropwise and the reaction mixture stirred at rt overnight. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was diluted with excess of DCM and washed with water and, the organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to obtain a residue which was purified by column chromatography to afford tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)methyl)piperidine-1-carboxylate (0.750 g, 89%). ¹H NMR (DMSO-d₆, 400 MHz) δ 8.69-8.66 (t, J=5.8 Hz, 1H) 6.46 (s, 1H), 3.90 (d, J=12.4 Hz, 2H), 3.11-3.08 (m, J=6.4 Hz, 2H), 2.67 (brs, 2H), 2.19-2.15 (m, 1H), 1.70-1.68 (m, 1H), 1.6 (brs, 1H), 1.58 (brs, 1H), 1.38 (s, 9H), 1.11-1.06 (m, 2H), 0.90-0.89 (m, 4H).

Step 2: Synthesis of 5-cyclopropyl-N-(piperidin-4-ylmethyl)isoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl 4-((5-cyclopropylisoxazole-3-carboxamido)methyl)piperidine-1-carboxylate (0.750 g, 2.148 mmol) in MeOH (4 mL) at 0° C. was added 4 M methanolic HCl (6 mL). The reaction was stirred at rt for 16 hours. The progress of the reaction was monitored by TLC. After complete consumption of starting material the solvent was removed under reduced pressure and the residue was washed with DCM and hexanes to obtain 5-cyclopropyl-N-(piperidin-4-ylmethyl)isoxazole-3-carboxamide hydrochloride (0.590 g, 96%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.88 (s, 1H), 8.78 (t, J=6.1 Hz, 1H), 8.59 (m, 1H), 6.49 (s, 1H), 3.27-3.09 (m, 4H), 2.80 (q, J=11.8 Hz, 2H), 2.18 (m, 1H), 1.79 (m, 3H), 1.41-1.26 (m, 2H), 1.09 (m, 2H), 1.00-0.87 (m, 2H); LCMS: m/z=250.05 (M+H)⁺.

Example 9 Synthesis of (S)—N-((1-(2-amino-3-methylbutanoyl)piperidin-4-yl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (Cpd. No. 226)

Step 1: Synthesis of (S)-tert-butyl (1-(4-((5-cyclopropylisoxazole-3-carboxamido)methyl)piperidin-1-yl)-3-methyl-1-oxobutan-2-yl)carbamate

To a stirred solution of (S)-2-((tert-butoxycarbonyl)amino)-3-methylbutanoic acid (0.156 g, 0.72 mmol) in DMF (2 mL) was added EDCI (0.172 g, 0.9 mmol), HOBt (0.121 g, 0.9 mmol), and triethylamine (0.3 mL, 1.8 mmol). The solution was stirred for 30 min at 0° C. 5-Cyclopropyl-N-(piperidin-4-ylmethyl)isoxazole-3-carboxamide (0.15 g, 0.6 mmol) was added and the reaction stirred at rt overnight. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford (S)-tert-butyl (1-(4-((5-cyclopropylisoxazole-3-carboxamido)methyl)piperidin-1-yl)-3-methyl-1-oxobutan-2-yl)carbamate (0.185 g, 68%). LCMS m/z=349.1 (M-Boc)⁺.

Step 2: Synthesis of (S)—N-((1-(2-amino-3-methylbutanoyl)piperidin-4-yl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

To a stirred solution of (S)-tert-butyl (1-(4-((5-cyclopropylisoxazole-3-carboxamido)methyl)piperidin-1-yl)-3-methyl-1-oxobutan-2-yl)carbamate (0.185 g, 0.33 mmol) in dioxane (1 mL) at 0° C. was added 4M dioxane:HCl (3 mL). The reaction mixture was stirred at rt for 3 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material the solvent was removed under reduced pressure to obtain a crude residue. The material was purified by repeated washing with ether and pentane to obtain (S)—N-((1-(2-amino-3-methylbutanoyl)piperidin-4-yl)methyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (0.1 g, 69%). ¹H NMR (400 MHz, DMSO-d₆): δ 8.75 (dt, J=7.1, 3.4 Hz, 1H), 8.03 (s, 3H), 6.48 (s, 1H), 4.43-4.31 (m, 1H), 4.27 (s, 1H), 3.93 (d, J=13.6 Hz, 1H), 3.21-2.97 (m, 3H), 2.66-2.53 (m, 1H), 2.18 (tt, J=8.4, 5.0 Hz, 1H), 2.01 (h, J=6.9 Hz, 1H), 1.89-1.78 (m, 1H), 1.70 (t, J=12.7 Hz, 1H), 1.26 (dd, J=10.3, 4.4 Hz, 1H), 1.16-0.82 (m, 12H); LCMS: m/z=349.3 (M+H)⁺.

Example 10 Synthesis of N-(4-(1-amino-3-(pyridin-3-yl)propyl)phenyl)-5-cyclopropylisoxazole-3-carboxamide (Cpd. No. 149)

Step 1: Synthesis of (E)-1-(4-aminophenyl)-3-(pyridin-3-yl)prop-2-en-1-one

To a stirred solution of 1-(4-aminophenyl)ethanone (2.0 g, 14.81 mmol) in MeOH:Water (1:1, 30 mL) was added nicotinaldehyde (1.58 g, 14.81 mmol) and potassium hydroxide (1.24 g, 22.22 mmol). The reaction mixture was stirred at rt for 12 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with dilute HCl and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford (E)-1-(4-aminophenyl)-3-(pyridin-3-yl)prop-2-en-1-one (2.0 g, 60%). LCMS: m/z=225.3 (M+H)⁺.

Step 2: Synthesis of 1-(4-aminophenyl)-3-(pyridin-3-yl)propan-1-one

To a stirred solution of (E)-1-(4-aminophenyl)-3-(pyridin-3-yl)prop-2-en-1-one (2.0 g, 8.9 mmol) in methanol (20 mL), 10% palladium-carbon (0.2 g) was added and the reaction mixture stirred under hydrogen atmosphere at 1 atm pressure at rt for 3 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction mixture was filtered through a pad of Celite and the filtrate was concentrated under reduced pressure to obtain a crude residue of 1-(4-aminophenyl)-3-(pyridin-3-yl)propan-1-one (1.5 g) which was used in the next step without purification. LCMS: m/z=227.05 (M+H)⁺.

Step 3: Synthesis of 5-cyclopropyl-N-(4-(3-(pyridin-3-yl)propanoyl)phenyl)isoxazole-3-carboxamide

To a stirred solution of 5-cyclopropylisoxazole-3-carboxylic acid (0.2 g, 1.3 mmol) and 2 drops of DMF in DCM (10 mL) was added oxalyl chloride (1 mL). The reaction mixture was stirred at rt for 2 h. After complete consumption of starting material, the solvent was removed under reduced pressure to obtain a crude residue. The residue was redissolved in DCM (5 mL). Triethylamine (0.35 mL, 2.61 mmol) and a solution of 1-(4-aminophenyl)-3-(pyridin-3-yl)propan-1-one (0.354 g, 1.56 mmol) in DCM (1 mL) was added at 0° C. to the reaction mixture. The mixture was stirred at rt for 1 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction mixture was quenched with saturated NaHCO₃ solution and extracted with DCM. The organic layer was separated, washed with brine, dried over Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford 5-cyclopropyl-N-(4-(3-(pyridin-3-yl)propanoyl)phenyl)isoxazole-3-carboxamide (0.4 g, 42%). LCMS: m/z=362.05 (M+H)⁺.

Step 4: Synthesis of N-(4-(1-amino-3-(pyridin-3-yl)propyl)phenyl)-5-cyclopropylisoxazole-3-carboxamide

To a stirred solution of 5-cyclopropyl-N-(4-(3-(pyridin-3-yl)propanoyl)phenyl)isoxazole-3-carboxamide (0.05 g, 0.13 mmol) in dry MeOH (10 mL) was added ammonium acetate (0.127 g, 1.66 mmol) and the reaction stirred at rt for 15 min. Sodium cyanoborohydride (0.034 g, 0.55 mmol) was then added. The reaction mixture was heated to reflux for 16 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with 0.5 M NaOH solution and extracted with ethyl acetate. The organic layer was washed with brine, dried over Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by prep HPLC to afford compound N-(4-(1-amino-3-(pyridin-3-yl)propyl)phenyl)-5-cyclopropylisoxazole-3-carboxamide (0.030 g, 12%). ¹H NMR (400 MHz, Methanol-d4): δ 8.41-8.29 (m, 2H), 7.88-7.79 (m, 2H), 7.69-7.65 (m, 1H), 7.49-7.41 (m, 2H), 7.39-7.35 (m, 1H), 6.48 (s, 1H), 4.21 (dd, J=8.8, 6.3 Hz, 1H), 2.70-2.51 (m, 2H), 2.34-2.23 (m, 2H), 2.2-2.15 (m, 1H), 1.31 (d, J=18.9 Hz, 1H), 1.21-1.11 (m, 2H), 1.04-0.95 (m, 2H); LCMS: m/z=362.17 (M+1)⁺.

Example 11 Synthesis of N-(4-aminobutyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (Cpd. No. 254)

Step 1: Synthesis of tert-butyl (4-(5-cyclopropylisoxazole-3-carboxamido) butyl)carbamate

To a stirred solution of 5-cyclopropylisoxazole-3-carboxylic acid (0.5 g, 3.2 mmol) in DMF (3 mL) was added EDCI.HCl (0.93 g, 4.9 mmol), HOBt (0.66 g, 4.9 mmol) and triethylamine (1.41 mL, 9.8 mmol). The solution was stirred for 10 min at 0° C. After that tert-butyl (4-aminobutyl) carbamate (0.67 g, 3.5 mmol) was added and the reaction stirred at rt for 16 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford tert-butyl (4-(5-cyclopropylisoxazole-3-carboxamido)butyl)carbamate (0.25 g, 20%). LCMS: m/z=234.05 (M-Boc)⁺.

Step 2: Synthesis of N-(4-aminobutyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl (4-(5-cyclopropylisoxazole-3-carboxamido)butyl)carbamate (0.24 g, 0.74 mmol) in dioxane (2 mL), was added 4M dioxane:HCl (2 mL) at 0° C. and the reaction mixture was stirred at rt for 5 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure to obtain a crude residue which was purified by Prep HPLC to obtain N-(4-aminobutyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (0.16 g, 96%). ¹H NMR (400 MHz, DMSO-d₆): δ 8.71 (t, J=5.9 Hz, 1H), 7.76 (s, 2H), 6.48 (s, 1H), 3.23 (q, J=6.0 Hz, 2H), 2.78 (q, J=6.1 Hz, 2H), 2.18 (td, J=8.6, 4.5 Hz, 1H), 1.54 (p, J=3.4 Hz, 4H), 1.1-1.08 (m, 2H), 0.96-0.87 (m, 2H); LCMS (method A, ESI): m/z=224.10 (M+H).

Example 12 Synthesis of (S)—N-(4-(2-aminopropanamido)butyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (Cpd. No. 249)

Step 1: Synthesis of (S)-tert-butyl (1-((4-(5-cyclopropylisoxazole-3-carboxamido)butyl) amino)-1-oxopropan-2-yl)carbamate

To a stirred solution of (S)-2-((tert-butoxycarbonyl) amino)propanoic acid (0.08 g, 0.37 mmol) in DMF (2 mL) was added EDCI.HCl (0.098 g, 0.51 mmol), HOBt (0.069 g, 0.51 mmol), and triethylamine (0.14 mL, 1.0 mmol). The solution was stirred for 10 min at 0° C. N-(4-Aminobutyl)-5-cyclopropylisoxazole-3-carboxamide (0.065 g, 0.34 mmol) was added and the reaction stirred at rt for 16 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous Na₂SO₄ and concentrated under reduced pressure to obtain a crude residue which was purified by column chromatography to afford (S)-tert-butyl (1-((4-(5-cyclopropylisoxazole-3-carboxamido)butyl)amino)-1-oxopropan-2-yl)carbamate (0.08 g, 59%). LCMS: m/z=296.15 (M-Boc)⁺.

Step 2: Synthesis of (S)—N-(4-(2-aminopropanamido)butyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

To a stirred solution of (S)-tert-butyl (1-((4-(5-cyclopropylisoxazole-3-carboxamido)butyl)amino)-1-oxopropan-2-yl)carbamate (0.08 g, 0.20 mmol) in dioxane (2 mL) at 0° C. was added 4M dioxane:HCl solution (4 mL). The reaction mixture was stirred at rt for 5 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure to obtain a crude residue which was purified by repeated washing with ether and pentane to obtain (S)—N-(4-(2-aminopropanamido)butyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (0.049 g, 83%). ¹H NMR (400 MHz, DMSO-d₆): δ 8.67 (t, J=5.9 Hz, 1H), 8.39 (t, J=5.6 Hz, 1H), 8.10 (s, 3H), 6.47 (s, 1H), 3.80-3.70 (m, 1H), 3.26-3.03 (m, 4H), 2.24-2.12 (m, 1H), 1.56-1.36 (m, 4H), 1.33 (d, J=6.9 Hz, 3H), 1.16-1.02 (m, 2H), 0.96-0.87 (m, 2H); LCMS (method A, ESI): m/z=295.15 (M+H)⁺.

Example 13 Synthesis of N-((1r,4r)-4-aminocyclohexyl)-5-(2-hydroxyethyl)isoxazole-3-carboxamide hydrochloride (Cpd. No. 9)

Step 1: Synthesis of ethyl 5-(2-hydroxyethyl)isoxazole-3-carboxylate

To a stirred solution of but-3-yn-1-ol (2 g, 28.5 mmol) in ethanol (15 mL), was added ethyl nitro acetate (7.59 g, 57.06 mmol) and DABCO (0.32 g, 2.85 mmol). The reaction was heated in a sealed tube at 80° C. The progress of the reaction was monitored by TLC. After complete consumption of staring material the reaction was quenched with water and extracted with ethyl acetate, the organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to obtain a residue which was purified by column chromatography to obtain ethyl 5-(2-hydroxyethyl)isoxazole-3-carboxylate (3.1 g, 59%). LCMS: m/z=186 (M+H)⁺.

Step 2: Synthesis of 5-(2-hydroxyethyl)isoxazole-3-carboxylic acid

To a stirred solution of ethyl 5-(2-hydroxyethyl)isoxazole-3-carboxylate (0.7 g, 3.78 mmol) in THF:MeOH:H₂O (1:1:1, 15 ml) was added LiOH (0.317 g, 7.56 mmol). The reaction was stirred at rt for 16 hr. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure and the residue was acidified with dilute HCl to pH 2. The solid precipitated was collected by filtration and dried under reduced pressure to obtain 5-(2-hydroxyethyl)isoxazole-3-carboxylic acid (0.529 g, crude). ¹H NMR (400 MHz, DMSO-d₆): δ 11.0 (brs, 1H), 6.40 (s, 1H), 3.69-3.65 (m, 2H), 3.0-2.95 (m, 2H).

Step 3: Synthesis of pentafluorophenyl 5-(2-hydroxyethyl)isoxazole-3-carboxylate

To a solution of 5-(2-hydroxyethyl)isoxazole-3-carboxylic acid (0.529 g, 1.27 mmol) in DMF (5 mL) at 0° C. under an N₂ atmosphere was added DCC (0.26 g, 1.27 mmol) followed by pentafluorophenol (0.233 g, 1.27 mmol). The reaction was stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to obtain a residue which was purified by column chromatography to give pentafluorophenyl 5-(2-hydroxyethyl)isoxazole-3-carboxylate (0.26 g, 63%). ¹H NMR (400 MHz, DMSO-d₆): δ 6.40 (s, 1H), 3.7-3.65 (m, 2H), 3.0-2.96 (m, 2H).

Step 4: Synthesis of tert-butyl ((1r,4r)-4-(5-(2-hydroxyethyl)isoxazole-3-carboxamido)cyclohexyl)carbamate

To a stirred solution of pentafluorophenyl 5-(2-hydroxyethyl)isoxazole-3-carboxylate (0.25 g, 0.77 mmol) in DMF (5 mL) was added tert-butyl ((1r, 4r)-4-aminocyclohexyl) carbamate (0.16 g, 0.77 mmol). The reaction was stirred at rt for 2 hr. and the progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to obtain a residue which was purified by column chromatography to obtain tert-butyl ((1r,4r)-4-(5-(2-hydroxyethyl)isoxazole-3-carboxamido)cyclohexyl)carbamate (0.130 g, 47%). LCMS: m/z=254 (M+H)⁺.

Step 5: Synthesis of N-((1r,4r)-4-aminocyclohexyl)-5-(2-hydroxyethyl)isoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl ((1r,4r)-4-(5-(2-hydroxyethyl)isoxazole-3-carboxamido)cyclohexyl)carbamate (0.1 g, 0.28 mmol) in methanol (1 mL) at 0° C. was added 4 M methanol:HCl (10 mL). The reaction was at rt stirred for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure and the residue was purified by washings with diethyl ether and hexane to obtain compound N-((1r,4r)-4-aminocyclohexyl)-5-(2-hydroxyethyl)isoxazole-3-carboxamide hydrochloride (0.060 g, 83%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.62-8.54 (m, 1H), 8.04 (d, J=5.6 Hz, 3H), 6.58 (s, 1H), 4.89 (s, 1H), 3.70 (t, J=6.3 Hz, 3H), 2.93 (t, J=6.3 Hz, 3H), 2.02-1.95 (m, 2H), 1.85 (d, J=7.1 Hz, 2H), 1.51-1.34 (m, 4H); LCMS: m/z=254 (M+H)⁺.

Example 14 Synthesis of N-((1r,4r)-4-aminocyclohexyl)-5-cyclopropyl-4-iodoisoxazole-3-carboxamide hydrochloride (Cpd. No. 8

Step 1: Synthesis of ethyl 5-cyclopropyl-4-iodoisoxazole-3-carboxylate

To the stirred solution of ethyl 5-cyclopropylisoxazole-3-carboxylate (1 g, 5.52 mmol) in TFA (16 ml), was added N-iodosuccinimide (1.48 g, 6.62 mmol) and reaction mixture stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and extracted with ethyl acetate. The organic layer was dried over sodium sulphate and evaporated under reduced pressure. The material was purified by column chromatography to afford ethyl 5-cyclopropyl-4-iodoisoxazole-3-carboxylate (1.27 g, 75%).

Step 2: Synthesis of 5-cyclopropyl-4-iodoisoxazole-3-carboxylic acid

To a stirred solution of ethyl 5-cyclopropyl-4-iodoisoxazole-3-carboxylate (1.27 g, 4.14 mmol) in THF:MeOH:H₂O (1:1:1, 9 ml) was added LiOH (1.04 g, 24.8 mmol). The solution was stirred at rt for 16 hr. After complete consumption of starting material, the residue was acidified to pH 2 with Amberlyst. The reaction mixture was filtration and concentrated under reduced pressure to obtain a compound 5-cyclopropyl-4-iodoisoxazole-3-carboxylic acid (1.01 g, 87%). LCMS: m/z=278.9 (M+H)⁺.

Step 3: Synthesis of tert-butyl ((1r,4r)-4-(5-cyclopropyl-4-iodoisoxazole-3-carboxamido)cyclohexyl)carbamate

To a stirred solution of 5-cyclopropyl-4-iodoisoxazole-3-carboxylic acid (1.0 g, 3.59 mmol) in DMF (10 ml) was added EDCI (0.892 g, 4.66 mmol) and HOBT (0.533 g, 3.94 mmol). The solution was stirred for 10 min at 0° C. Next tert-butyl ((1r,4r)-4-aminocyclohexyl)carbamate (0.769 g, 3.59 mmol) was added and the reaction was stirred at rt for 2 hr. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was quenched with water and the solid precipitated was collected by filtration and dried under reduced pressure to obtain a residue. The material was purified by column chromatography to afford tert-butyl ((1r,4r)-4-(5-cyclopropyl-4-iodoisoxazole-3-carboxamido)cyclohexyl)carbamate (0.48 g, 28%).

Step 4: Synthesis of N-((1r,4r)-4-aminocyclohexyl)-5-cyclopropyl-4-iodoisoxazole-3-carboxamide hydrochloride

To a stirred solution of tert-butyl ((1r,4r)-4-(5-cyclopropyl-4-iodoisoxazole-3-carboxamido)cyclohexyl)carbamate (0.1 g, 0.210 mmol) in methanol (3 ml) at 0° C. was added 4 M methanolic:HCl (3 ml). The reaction was stirred for at rt for 1 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure and the residue was purified by washing with diethyl ether to obtain N-((1r,4r)-4-aminocyclohexyl)-5-cyclopropyl-4-iodoisoxazole-3-carboxamide hydrochloride (0.008 g, 10%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.70 (d, J=7.9 Hz, 1H), 7.92 (s, 3H), 3.67 (d, J=10.0 Hz, 1H), 2.96 (t, J=9.5 Hz, 1H), 2.20-2.17 (m, 1H), 1.97 (d, J=9.4 Hz, 2H), 1.87 (d, J=10.4 Hz, 2H), 1.39 (q, J=12.2, 11.2 Hz, 4H), 1.21-1.11 (m, 2H), 1.07-0.98 (m, 2H); LCMS (method C, ESI): m/z=375 (M+H)⁺.

Example 15 Synthesis of N3-((1r,4r)-4-aminocyclohexyl)-5-cyclopropylisoxazole-3,4-dicarboxamide hydrochloride (Cpd. No. 13)

Step 1: Synthesis of 3-(((1r,4r)-4-((tert-butoxycarbonyl)amino)cyclohexyl)carbamoyl)-5-cyclopropylisoxazole-4-carboxylic acid

To the stirred solution of tert-butyl ((1r,4r)-4-(5-cyclopropyl-4-iodoisoxazole-3-carboxamido)cyclohexyl)carbamate (1.6 g, 3.37 mmol) in DMF:H₂O (4:1, 10 ml) was added Pd(OAc)₂ (0.037 g, 0.168 mmol) and dppf (0.186 g, 0.337 mmol) and the reaction heated at 55° C. under CO balloon pressure overnight. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was filtered, diluted with water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried using Na₂SO₄ and concentrated under reduced pressure to obtain a residue which was purified by column chromatography to obtain 3-(((1r,4r)-4-((tert-butoxycarbonyl)amino)cyclohexyl)carbamoyl)-5-cyclopropylisoxazole-4-carboxylic acid (0.350 g, 26%).

Step 2: Synthesis of pentafluorophenyl 3-(((1r,4r)-4-((tert-butoxycarbonyl)amino) cyclohexyl)carbamoyl)-5-cyclopropylisoxazole-4-carboxylate

To the stirred solution of 3-(((1r,4r)-4-((tert-butoxycarbonyl)amino) cyclohexyl)carbamoyl)-5-cyclopropylisoxazole-4-carboxylic acid (0.2 g, 0.508 mmol) in DMF (2 mL) at 0° C. was added pentafluorophenol (0.093 g, 0.508 mmol) and DCC (0.054 g, 0.508 mmol). The reaction was stirred at rt for 30 min. After complete consumption of starting material, the reaction was quenched with water and extracted with DCM; the organic layer was separated, washed with sodium bicarbonate solution, dried using Na₂SO₄ and concentrated under reduced pressure to obtain pentafluorophenyl 3-(((1r,4r)-4-((tert-butoxycarbonyl)amino)cyclohexyl)carbamoyl)-5-cyclopropylisoxazole-4-carboxylate (0.250 g). The material was used without further purification LCMS: m/z=583.12 (M+Na)⁺.

Step 3: Synthesis of tert-butyl ((1r,4r)-4-(4-carbamoyl-5-cyclopropylisoxazole-3-carboxamido)cyclohexyl)carbamate

Ammonia was bubbled through a stirred solution of pentafluorophenyl 3-(((1r,4r)-4-((tert-butoxycarbonyl)amino)cyclohexyl)carbamoyl)-5-cyclopropylisoxazole-4-carboxylate (0.08 g, 0.143 mmol) in DCM (2 mL) at 0° C. for 30 min. The reaction was then stirred at rt for 2 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction was evaporated to complete dryness. The material was purified by trituration with hexane and diethyl ether to obtain tert-butyl ((1r,4r)-4-(4-carbamoyl-5-cyclopropylisoxazole-3-carboxamido)cyclohexyl) carbamate (0.040 g, 71%).

Step 4: Synthesis of N3-((1r,4r)-4-aminocyclohexyl)-5-cyclopropylisoxazole-3,4-dicarboxamide hydrochloride

To a stirred solution of tert-butyl ((1r,4r)-4-(4-carbamoyl-5-cyclopropylisoxazole-3-carboxamido)cyclohexyl)carbamate (0.040 g, 0.101 mmol) in dioxane (2 mL) at 0° C. was added 4 M dioxane:HCl (3 mL). The reaction was stirred at rt for 1 h and progress monitored by TLC. After complete consumption of starting material, the solvent was removed under reduced pressure and the residue was purified by washing with diethyl ether to obtain N3-((1r,4r)-4-aminocyclohexyl)-5-cyclopropylisoxazole-3,4-dicarboxamide hydrochloride (0.022 g, 75%). ¹H NMR (400 MHz, DMSO-d₆) δ 9.10 (d, J=7.8 Hz, 1H), 8.50-8.45 (m, 1H), 7.91 (s, 3H), 7.64 (s, 1H), 3.83 (brs, 1H), 3.0-2.97 (m, 2H), 1.96 (d, J=7.6 Hz, 2H), 1.91-1.84 (m, 2H), 1.49-1.36 (m, 4H), 1.24-1.21 (m, 2H), 1.15-1.10 (m, 2H); LCMS: m/z=293.15 (M+H)⁺.

Example 16 Synthesis of N-(6-((R)-3-aminobutanamido)bicyclo[3.3.1]nonan-2-yl)-5-cyclopropylisoxazole-3-carboxamide (Cpd. No. 293)

Step 1: Synthesis of N²,N⁶-dibenzylbicyclo[3.3.1]nonane-2,6-diamine

To a solution of bicyclo[3.3.1]nonane-2,6-dione (1.0 g, 6.5707 mmol) in THF (10 mL) was added benzyl amine (2.87 mL, 26.283 mmol) under N₂ atmosphere at rt and stirred for 5 minutes. AcOH (0.8 mL, 1.3798 mmol) was added and mixture was cooled to 0° C. Sodium triacetoxy borohydride (5.57 g, 26.283 mmol) was added portionwise over 30 min. The reaction was allowed to stir at rt overnight. The reaction was diluted with water (20 mL) and neutralized with saturated aq. solution of NaHCO₃ (80 mL). The mixture was extracted with DCM (40 mL×4). The combined organic layer was washed with saturated aq. solution of NaHCO₃ (50 mL), brine (50 mL), dried over Na₂SO₄ and concentrated under reduced pressure to give crude product, which was purified by column chromatography using mobile phase 0.3% methanol in DCM to obtain N²,N⁶-dibenzylbicyclo[3.3.1]nonane-2,6-diamine (1.3 g, yield 59.14%) LCMS: m/z=335.16 [M+H]⁺.

Step 2: Synthesis of bicyclo[3.3.1]nonane-2,6-diamine

To a suspension of 10% Pd/C (dry) in MeOH (3 mL) was added solution of N²,N⁶-dibenzylbicyclo[3.3.1]nonane-2,6-diamine (1.3 g, 3.886 mmol) in MeOH (10 mL). The reaction was stirred overnight under a H₂ atmosphere. The reaction was filtered through a celite pad and washed with MeOH (50 mL). The filtrate was concentrated under reduced pressure to obtain title compound (0.5 g, yield 83.4%). LCMS: m/z=155.20 [M+H]⁺.

Step 3: Synthesis of tert-Butyl (6-aminobicyclo[3.3.1]nonan-2-yl)carbamate

To a solution of bicyclo[3.3.1]nonane-2,6-diamine (500 mg, 3.241 mmol) in a mixture of MeOH (10 mL) and THF (20 mL) at 0° C. under N₂ atmosphere was added a solution of Boc-anhydride (0.37 mL, 1.620 mmol) in mixture of MeOH (20 mL) and THF (50 mL) over a period of 6 hours. The reaction was allowed to stir at rt overnight. The reaction was concentrated under reduced pressure to give crude product which was purified by column chromatography using basic alumina as stationary phase and 0-4% MeOH in DCM as mobile phase to obtain title compound (290 mg, yield 35.17%). LCMS: m/z=255.25 [M+H]⁺.

Step 4: Synthesis of tert-Butyl (6-(5-cyclopropylisoxazole-3-carboxamido)bicyclo[3.3.1]nonan-2-yl)carbamate

To a solution of 5-cyclopropylisoxazole-3-carboxylic acid (175 mg, 1.14 mmol) in DMF at 0° C. under N₂ atmosphere was added HATU (650 mg, 1.71 mmol). The reaction stirred for 20 min. and then tert-butyl (6-aminobicyclo[3.3.1]nonan-2-yl)carbamate (290 mg, 1.14 mmol) was added followed by addition of DIPEA (0.6 mL, 3.42 mmol). The reaction was brought to rt and stirred overnight. The reaction was diluted with water (50 mL) and extracted with ethyl acetate (50 mL×3). The combined organic layer was washed with brine (20 mL), dried over Na₂SO₄ and concentrated to give crude product which was purified by column chromatography using mobile phase to 0-12% ethyl acetate in hexane to obtain the title compound (300 mg, yield 75.5%). LCMS: m/z=334.36 [M−56]⁺.

Step 5: Synthesis of N-(6-aminobicyclo[3.3.1]nonan-2-yl)-5-cyclopropylisoxazole-3-carboxamide TFA Salt

To a solution of tert-butyl (6-(5-cyclopropylisoxazole-3-carboxamido)bicyclo[3.3.1]nonan-2-yl)carbamate (300 mg, 0.7702 mmol) in DCM (3 mL) at 0° C. under N₂ atmosphere was added TFA (1.5 mL). The reaction was allowed to stir at rt for 2 hours. The reaction was concentrated under reduced pressure and triturated with diethyl ether to obtain the title compound as the TFA salt (300 mg, yield 96.5%). LCMS: m/z=290.36 [M+H]⁺.

Step 6: Synthesis of tert-butyl ((2R)-4-((6-(5-cyclopropylisoxazole-3-carboxamido) bicyclo[3.3.1]nonan-2-yl)amino)-4-oxobutan-2-yl)carbamate

To a solution of the TFA salt of (R)-3-((tert-butoxycarbonyl) amino)butanoic acid (50 mg, 0.246 mmol) in DMF (1.0 mL) at 0° C. was added HATU (140 mg, 0.369 mmol). After stirring for 15 minutes, the TFA salt of N-(6-aminobicyclo[3.3.1]nonan-2-yl)-5-cyclopropylisoxazole-3-carboxamide (100 mg, 0.246 mmol) was added followed by addition of DIPEA (0.126 mL, 0.738 mmol). The reaction was brought to rt and stirred overnight. The reaction was diluted with water (20 mL) and extracted with ethyl acetate (20 mL×3). The combined organic layer was dried over Na₂SO4 and concentrated under reduced pressure to give crude product which was purified by column chromatography using mobile phase 0-70% ethyl acetate in hexane to obtain the title compound (80 mg, 67.9%). LCMS: m/z=475.16 [M+H]⁺.

Step 7: Synthesis of N-(6-((R)-3-aminobutanamido)bicyclo[3.3.1]nonan-2-yl)-5-cyclopropylisoxazole-3-carboxamide

To a solution of tert-butyl ((2R)-4-((6-(5-cyclopropylisoxazole-3-carboxamido)bicyclo[3.3.1]nonan-2-yl)amino)-4-oxobutan-2-yl)carbamate (80 mg, 0.1686 mmol) in DCM (0.8 mL) at 0° C. under N₂ atmosphere was added TFA (0.4 mL) dropwise. The reaction was allowed to stir at room temperature for 2 hours. The reaction was concentrated under reduced pressure to give crude product which was triturated with diethyl ether (10 mL) and hexanes (10 mL) to obtain the title compound as TFA salt (50 mg, 60.7%). ¹H NMR (400 MHz, DMSO-d₆) δ 8.667 (d, 1H), 8.180 (d, 1H), 7.792 (s, 3H), 6.478 (s, 1H), 4.067 (s, 1H), 3.907 (s, 1H), 3.39 (s, 1H), 2.42 (s, 2H), 2.18 (s, 2H), 2.42 (s, 2H), 1.91-1.88 (m, 4H), 1.78-1.65 (m, 4H), 1.54-1.50 (m, 4H), 1.16-1.09 (m, 5H), 0.917 (s, 1H); LCMS: m/z=375.4 [M+1]+.

Example 17 Synthesis of N-(4-(3-aminopropanamido)phenyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride (Cpd. No. 325)

Step 1: Synthesis of N-(4-aminophenyl)-5-cyclopropylisoxazole-3-carboxamide

Into a 250-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen was placed dichloromethane (40 mL) and benzene-1,4-diamine (1.059 g, 9.79 mmol, 1.05 equiv); then 5-cyclopropyl-1,2-oxazole-3-carbonyl chloride (1.6 g, 9.33 mmol, 1.00 equiv) in 10 mL DCM was added dropwise. The resulting solution was stirred for 12 h at room temperature. The resulting mixture was concentrated under vacuum. The solids were filtered off. The filtrate was extracted with 2×100 mL of ethyl acetate and the organic layers combined and concentrated under vacuum. The residue was purified on a silica gel column with ethyl acetate/petroleum ether (10:1). This resulted in 750 mg (33%) of N-(4-aminophenyl)-5-cyclopropylisoxazole-3-carboxamide as a yellow solid. LCMS: rt=1.04 min, m/z=285.0 [M+CN]⁺.

Step 2: Synthesis of tert-butyl 3-(4-(5-cyclopropylisoxazole-3-carboxamido) phenylamino)-3-oxopropylcarbamate

Into a 100-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen was placed N-(4-aminophenyl)-5-cyclopropylisoxazole-3-carboxamide (170 mg, 0.70 mmol, 1.00 equiv), tetrahydrofuran (5 mL), dichloromethane (5 mL), EDCI (401 mg, 2.09 mmol, 2.99 equiv), DIEA (271 mg, 2.10 mmol, 3.00 equiv), HOBT (283 mg, 2.09 mmol, 3.00 equiv), and 3-[[(tert-butoxy)carbonyl]amino]propanoic acid (264 mg, 1.40 mmol, 2.00 equiv). The resulting solution was stirred for 6 h at room temperature. The mixture was concentrated under vacuum. The residue was diluted with 50 mL of H₂O and extracted with DCM. The organic phase was collected and dried over anhydrous sodium sulfate. The residue was purified on a silica gel column with ethyl acetate/petroleum ether (5:1). This resulted in 120 mg (41%) of tert-butyl 3-(4-(5-cyclopropylisoxazole-3-carboxamido)phenylamino)-3-oxopropylcarbamate as a light yellow solid. LCMS: m/z=437.1 [M+Na]⁺.

Step 3: Synthesis of N-(4-(3-aminopropanamido)phenyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride

Into a 50-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen was placed tert-butyl 3-(4-(5-cyclopropylisoxazole-3-carboxamido)phenylamino)-3-oxopropylcarbamate (120 mg, 0.29 mmol, 1.00 equiv) and 1,4-dioxane (5 mL). Then hydrogen chloride was introduced into the mixture. The resulting solution was stirred for 2 h at room temperature. The mixture was then concentrated under vacuum. The crude product was purified by Flash-Prep-HPLC with the following conditions (IntelFlash-1): Column, silica gel; mobile phase, detector, UV 254 nm. The result solution was acidified by dilute hydrochloric acid (1N), then concentrated and dried. This resulted in 21.4 mg (24%) of N-(4-(3-aminopropanamido)phenyl)-5-cyclopropylisoxazole-3-carboxamide hydrochloride as a white solid. ¹H-NMR (300 MHz, D₂O): δ 7.54-7.37 (m, 4H), 6.36 (s, 1H), 3.25 (t, J=6.6 Hz, 2H), 2.77 (t, J=6.6 Hz, 2H), 2.12-2.04 (m, 1H), 1.08-1.02 (m, 2H), 0.97-0.92 (m, 2H). LCMS: m/z=315.0 [M+H]⁺.

Example 18 Synthesis of N-(1-((1-(4-chlorobenzyl)-1H-pyrazol-4-yl)methyl)azetidin-3-yl)-5-cyclopropylisoxazole-3-carboxamide (Cpd. No. 428)

Step 1: Synthesis of tert-butyl 3-(5-cyclopropylisoxazole-3-carboxamido)azetidine-1-carboxylate

To a solution of 5-cyclopropylisoxazole-3-carboxylic acid (1.53 g) in DMF (20 mL) was added HATU (6.84 g, DIPEA (3.87 g) and tert-butyl 3-aminoazetidine-1-carboxylate (2.58 g). The resulting mixture was stirred at r.t. overnight. The reaction mixture was diluted with ethyl acetate (120 mL), washed with brine (30 mL×4), dried over Na₂SO₄ and concentrated under reduced pressure. The residue was purified by flash column chromatography (eluant petroleum ether: ethyl acetate gradient elution 100:0 to 50:50) to afford tert-butyl 3-(5-cyclopropylisoxazole-3-carboxamido)azetidine-1-carboxylate (2.55 g, 83%) as a pale yellow solid. ESI-LCMS (m/z): 330[M+Na]⁺.

Step 2: Synthesis of N-(azetidin-3-yl)-5-cyclopropylisoxazole-3-carboxamide

To a solution of tert-butyl 3-(5-cyclopropylisoxazole-3-carboxamido)azetidine-1-carboxylate (2.55 g) in DCM (10 mL) was added TFA (4 mL) drop-wise. The resulting mixture was stirred at r.t. overnight. The reaction mixture was concentrated under reduced pressure and the residue was treated with ammonia in MeOH (7N, 30 mL) and the solution concentrated under reduced pressure. The residue was purified by flash column chromatography (eluant: DCM:MeOH (MeOH:7N NH₃ 100:1) 10:1) to afford N-(azetidin-3-yl)-5-cyclopropylisoxazole-3-carboxamide (1.35 g, 78%) as a white solid. ESI-LCMS (m/z): 208[M+H]⁺.

Step 3: Synthesis of N-(1-((1-(4-chlorobenzyl)-1H-pyrazol-4-yl)methyl)azetidin-3-yl)-5-cyclopropylisoxazole-3-carboxamide

Into the stirred solution of N-(azetidin-3-yl)-5-cyclopropylisoxazole-3-carboxamide (400 mg, 1.9 mmol) and 1-(4-chlorobenzyl)-1H-pyrazole-4-carbaldehyde (425 mg, 1.9 mmol) in MeOH (10 mL) was added NaBH₃CN (363 mg, 5.8 mmol). The mixture was stirred at 60° C. for 20 h. The product was purified by reversed phased pre-HPLC (NH₄HCO3, CH₃CN:H₂O=5%-95%) to afford N-(1-((1-(4-chlorobenzyl)-1H-pyrazol-4-yl)methyl)azetidin-3-yl)-5-cyclopropylisoxazole-3-carboxamide as a white solid (70 mg, 8.8%). ESI-LCMS (m/z): 412 [M+H]⁺; ¹HNMR (400 MHz, CD₃OD) δ ppm: 7.64 (s, 1H), 7.50 (s, 1H), 7.37-7.33 (m, 2H), 7.20 (d, J=8.8 Hz, 2H), 6.37 (s, 1H), 5.32 (s, 2H), 4.61-4.58 (m, 1H), 3.70-3.66 (m, 2H), 3.61 (s, 2H), 3.22-3.18 (m, 2H), 2.19-2.15 (m, 1H), 1.18-1.13 (m, 2H), 1.00-0.96 (m, 2H).

Example 19 SMYD3 Biochemical Assay

General Materials

S-adenosylmethionine (SAM), S-adenosylhomocysteine (SAH), Tris, Tween20, dimethylsulfoxide (DMSO), bovine skin gelatin (BSG), and Tris(2-carboxyethyl)phosphine hydrochloride solution (TCEP) were purchased from Sigma-Aldrich at the highest level of purity possible. ³H-SAM was purchase from American Radiolabeled Chemicals with a specific activity of 80 Ci/mmol. 384-well opaque white OptiPlates and SPA beads (Perkin Elmer, catalog # RPNQ0013) were purchased from PerkinElmer.

Substrates

N-terminally GST-tagged MEKK2 (MAP3K2) protein corresponding to reference sequence AAF63496.3 was purchased from Life Technologies (catalog # PV4010). This protein was expressed in High Five insect cells and purified to >85% purity. Protein identity was confirmed by MS/MS analysis after proteolytic digestion. The protein sequence used was:

(SEQ ID No. 1) MAPILGYWKIKGLVQPTRLLLEYLEEKYEEHLYERDEGDKWRNK KFELGLEFPNLPYYIDGDVKLTQSMAIIRYIADKHNMLGGCPKERA EISMLEGAVLDIRYGVSRIAYSKDFETLKVDFLSKLPEMLKMFEDR LCHKTYLNGDHVTHPDFMLYDALDVVLYMDPMCLDAFPKLVCF KKRIEAIPQIDKYLKSSKYIAWPLQGWQATFGGGDHPPKSDLVPRH NQTSLYKKAGTMDDQQALNSIMQDLAVLHKASRPALSLQETRKA KSSSPKKQNDVRVKFEHRGEKRILQFPRPVKLEDLRSKAKIAFGQS MDLHYTNNELVIPLTTQDDLDKALELLDRSIHMKSLKILLVINGST QATNLEPLPSLEDLDNTVFGAERKKRLSIIGPTSRDRSSPPPGYIPDE LHQVARNGSFTSINSEGEFIPESMEQMLDPLSLSSPENSGSGSCPSL DSPLDGESYPKSRMPRAQSYPDNHQEFSDYDNPIFEKFGKGGTYPR RYHVSYHHQEYNDGRKTFPRARRTQGNQLTSPVSFSPTDHSLSTSS GSSIFTPEYDDSRIRRRGSDIDNPTLTVMDISPPSRSPRAPTNWRLG KLLGQGAFGRVYLCYDVDTGRELAVKQVQFDPDSPETSKEVNAL ECEIQLLKNLLHERIVQYYGCLRDPQEKTLSIFMEYMPGGSIKDQL KAYGALTENVTRKYTRQILEGVHYLHSNMIVHRDIKGANILRDST GNVKLGDFGASKRLQTICLSGTGMKSVTGTPYWMSPEVISGQGYG RKADIWSVACTVVEMLTEKPPWAEFEAMAAIFKIATQPTNPKLPP HVSDYTRDFLKRIFVEAKLRPSADELLRHMFVHYH.. Molecular Biology

Full-length human SMYD3 isoform 1 (BAB86333) was inserted into a modified pET21b plasmid containing a His6 tag and TEV and SUMO cleavage sites. Because two common variants of SMYD3 exist in the population, site directed mutagenesis was subsequently performed to change amino acid 13 from an asparagine to a lysine, resulting in plasmid pEPZ533. A lysine at position 13 conforms to the more commonly occurring sequence (NP_001161212).

Protein Expression

E. coli (BL21 codonplus RIL strain, Stratagene) were transformed with plasmid pEPZ553 by mixing competent cells and plasmid DNA and incubating on ice for 30 minutes followed by heat shock at 42° C. for 1 minute and cooling on ice for 2 minutes. Transformed cells were grown and selected on LB agar with 100 μg/mL ampicillin and 17 μg/mL chloramphenicol at 37° C. overnight. A single clone was used to inoculate 200 mL of LB medium with 100 μg/mL ampicillin and 17 μg/mL chloramphenicol and incubated at 37° C. on an orbital shaker at 180 rpm. Once in log growth, the culture was diluted 1:100 into 2 L of LB medium and grown until OD₆₀₀ was about 0.3 after which the culture was incubated at 15° C. and 160 rpm. Once OD₆₀₀ reached about 0.4, IPTG was added to a final concentration of 0.1 mM and the cells were grown overnight at 15° C. and 160 rpm. Cells were harvested by centrifugation at 8000 rpm, for 4 minutes at 4° C. and stored at −80° C. for purification.

Protein Purification

Expressed full-length human His-tagged SMYD3 protein was purified from cell paste by Nickel affinity chromatography after equilibration of the resin with Buffer A (25 mM Tris, 200 mM NaCl, 5% glycerol, 5 mM (3-mercaptoethanol, pH7.8). The column was washed with Buffer B (Buffer A plus 20 mM imidazole) and His-tagged SMYD3 was eluted with Buffer C (Buffer A plus 300 mM imidazole). The His tag, TEV and SUMO cleavage sites were removed generating native SMYD3 by addition of ULP1 protein at a ratio of 1:200 (ULP1:SMYD3). Imidazole was removed by dialysis overnight in Buffer A. The dialyzed solution was applied to a second Nickel column and the native SMYD3 protein was collected from the column flow-through. The flow-through was dialyzed in Buffer D (25 mM Tris, 5% glycerol, 5 mM β-mercaptoethanol, 50 mM NaCl, pH7.8) and ULP1 was removed using a Q sepharose fast flow column. SMYD3 was eluted in Buffer A and further purified using an S200 size-exclusion column equilibrated with Buffer A. SMYD3 was concentrated to 2 mg/mL with a final purity of 89%.

Predicted Translation:

SMYD3 (Q9H7B4) (SEQ ID No. 2) MEPLKVEKFATAKRGNGLRAVTPLRPGELLFRSDPLAYTVCKGSR GVVCDRCLLGKEKLMRCSQCRVAKYCSAKCQKKAWPDHKRECK CLKSCKPRYPPDSVRLLGRVVFKLMDGAPSESEKLYSFYDLESNIN KLTEDKKEGLRQLVMTFQHFMREEIQDASQLPPAFDLFEAFAKVIC NSFTICNAEMQEVGVGLYPSISLLNHSCDPNCSIVFNGPHLLLRAV RDIEVGEELTICYLDMLMTSEERRKQLRDQYCFECDCFRCQTQDK DADMLTGDEQVWKEVQESLKKIEELKAHWKWEQVLAMCQAIISS NSERLPDINIYQLKVLDCAMDACINLGLLEEALFYGTRTMEPYRIFF PGSHPVRGVQVMKVGKLQLHQGMFPQAMKNLRLAFDIMRVTHG REHSLIEDLILLLEECDANIRAS.. General Procedure for SMYD3 Enzyme Assays on MEKK2 Protein Substrate

The assays were all performed in a buffer consisting of 25 mM Tris-Cl pH 8.0, 1 mM TCEP, 0.005% BSG, and 0.005% Tween 20, prepared on the day of use. Compounds in 100% DMSO (1 ul) were spotted into a 384-well white opaque OptiPlate using a Bravo automated liquid handling platform outfitted with a 384-channel head (Agilent Technologies). DMSO (1 ul) was added to Columns 11, 12, 23, 24, rows A-H for the maximum signal control and 1 ul of SAH, a known product and inhibitor of SMYD3, was added to columns 11, 12, 23, 24, rows I-P for the minimum signal control. A cocktail (40 ul) containing the SMYD3 enzyme was added by Multidrop Combi (Thermo-Fisher). The compounds were allowed to incubate with SMYD3 for 30 min at room temperature, then a cocktail (10 ul) containing SAM and MEKK2 was added to initiate the reaction (final volume=51 ul). The final concentrations of the components were as follows: SMYD3 was 0.4 nM, ³H-SAM was 8 nM, MEKK2 was 12 nM, SAH in the minimum signal control wells was 1 mM, and the DMSO concentration was 2%. The assays were stopped by the addition of non-radiolabeled SAM (10 ul) to a final concentration of 100 uM, which dilutes the ³H-SAM to a level where its incorporation into MEKK2 is no longer detectable. Radiolabeled MEKK2 was detected using a scintillation proximity assay (SPA). 10 uL of a 10 mg/mL solution of SPA beads in 0.5 M citric acid was added and the plates centrifuged at 600 rpm for 1 min to precipitate the radiolabeled MEKK2 onto the SPA beads. The plates were then read in a PerkinElmer TopCount plate reader to measure the quantity of ³H-labeled MEKK2 as disintegrations per minute (dpm) or alternatively, referred to as counts per minute (cpm). % inhibition calculation

${\%\mspace{14mu}{ink}} = {100 - {\left( \frac{{dpm}_{cmpd} - {dpm}_{\min}}{{dpm}_{\max} - {dpm}_{\min}} \right) \times 100}}$

Where dpm=disintegrations per minute, cmpd=signal in assay well, and min and max are the respective minimum and maximum signal controls.

Four-parameter IC50 fit

$Y = {{Bottom} + \frac{\left( {{Top} - {Bottom}} \right)}{\left( {1 + \left( \frac{X}{{IC}_{50}} \right)^{{Hill}\mspace{14mu}{Coeffiicient}}} \right.}}$

Where top and bottom are the normally allowed to float, but may be fixed at 100 or 0 respectively in a 3-parameter fit. The Hill Coefficient normally allowed to float but may also be fixed at 1 in a 3-parameter fit. Y is the % inhibition and X is the compound concentration.

SMYD3 biochemical assay data for representative Compounds of the Disclosure are presented in Table 1 in the column titled “SMYD3 Biochem IC₅₀ (μM).”

Example 20 SMYD3 Cell Assay

Trimethyl-MEKK2-In-Cell Western Assay

293T/17 adherent cells were purchased from ATCC (American Type Culture Collection), Manassas, Va., USA. MEM/Glutamax medium, Optimem Reduced Serum medium, penicillin-streptomycin, 0.05% trypsin and 1×D-PBS were purchased from Life Technologies, Grand Island, N.Y., USA. PBS-10× was purchased from Ambion, Life Technologies, Grand Island, N.Y., USA. PBS with Tween 20 (PBST (10×)) was purchased from KPL, Gaithersburg, Md., USA. Tet System FBS—approved FBS US Source was purchased from Clontech, Mountain View, Calif., USA. Odyssey blocking buffer, 800CW goat anti-rabbit IgG (H+L) antibody, 680CW Goat anti-mouse IgG (H+L) and Licor Odyssey infrared scanner were purchased from Licor Biosciences, Lincoln, Nebr., USA. Tri-methyl-Lysine [A260]-MEKK2 antibody, MEKK2 and SMYD3 plasmids were made at Epizyme. Anti-flag monoclonal mouse antibody was purchased from Sigma, St. Louis, Mo., USA. Methanol was purchased from VWR, Franklin, Mass., USA. 10% Tween 20 was purchased from KPL, Inc., Gaithersburg, Md., USA. Fugene was purchased from Promega, Madison, Wis., USA. The Biotek ELx405 was purchased from BioTek, Winooski, Vt., USA. The multidrop combi was purchased from Thermo Scientific, Waltham, Mass., USA.

293T/17 adherent cells were maintained in growth medium (MEM/Glutamax medium supplemented with 10% v/v Tet System FBS and cultured at 37° C. under 5% CO₂.

Cell treatment, In Cell Western (ICW) for detection of trimethyl-lysine-MEKK2 and MEKK2.

293T/17 cells were seeded in assay medium at a concentration of 33,333 cells per cm² in 30 mL medium per T150 flask and incubated at 37° C. under 5% CO₂. Plasmids were prepared for delivery to cells by first mixing 1350 μL Opti-MEM with Fugene (81 μL) in a sterile Eppendorf and incubated for five minutes at room temperature (RT). MEKK2-flag (13.6 ug/T150) MEKK2 p3XFlag-CMV-14 with C-3XFlag and SMYD3 (0.151 ug/T150) SMYD3 p3XFlag-CMV-14 without C-3XFlag plasmids were aliquotted to a 1.7 mL sterile microfuge tube. The gene ID for MEKK2 and SMYD3 is NM_006609.3 and Q9H7B4, respectively. Entire volume of Opti-MEM/Fugene mixture was then added to a microfuge tube containing DNA plasmid, mixed and then incubated×15 minutes at RT. The medium on the 293T/17 cells was refreshed, and the DNA/Fugene complex is added aseptically to each flask, rocked gently, and incubated at 37 C for 5 hours. Medium was then removed, and cells were washed once with PBS in the flask. Trypsin 0.05% (3 mL) was added and cells incubated for three minutes. Room temperature MEM+10% Tet system FBS was added and cells were mixed gently, and counted using the Vi-cell. Cells were seeded at 100,000 cells/mL in 50 μL MEM/10% Tet FBS/Pen/Strep to a 384 well black/clear poly-D-lysine coated plate containing test agent diluted in DMSO. The final top concentration of test compound was 40 μM. The total concentration of DMSO did not exceed 0.2% (v/v). Plates were incubated×30 minutes at RT in low-airflow area, followed by incubation at 37° C. under 5% CO₂ for 24 hours. Medium was aspirated from all wells of assay plates prior to fixation and permeabilization with ice cold (−20° C.) methanol (90 μL/well) for ten minutes. Plates were rinsed with PBS three times on BioTek ELx405. PBS was removed with a final aspiration, and Odyssey blocking buffer (50 μL/well) was added to each well and incubated for one hour at RT. Primary antibody solution was prepared (anti-trimethyl-MEKK2 at 1:600 dilution plus mouse anti-flag antibody at 1:10,000 dilution in diluent (Odyssey Blocking buffer+0.1% Tween 20)) and 20 μL per well was dispensed using the Multidrop Combi. Assay plates were then sealed with foil, and incubated overnight at 4° C. Plates were washed five times with PBS-Tween (1×) on Biotek ELx405 and blotted on paper towel to remove excess reagent. Detection antibody solution (IRDye 800 CW goat anti-rabbit IgG diluted 1:400 in diluent (Odyssey Blocking buffer+0.1% Tween 20), plus IRDye 680CW goat anti-mouse IgG at 1:500 in diluent (Odyssey Blocking buffer+0.1% Tween 20) was added (20 μL/well) and incubated in dark for one hour at RT. Plates were then washed four times with PBS-T (1×) on ELx405. A final rinse with water was performed (115 μL/well×three washes on the ELx405). Plates were then centrifuged upside down, on paper towel, at 200×g to remove excess reagent. Plates were left to dry in dark for one hour. The Odyssey Imager was used to measure the integrated intensity of 700 and 800 wavelengths at resolution of 84 μm, medium quality, focus offset 4.0, 700 channel intensity=3.5 to measure the MEKK2-flag signal, 800 channel intensity=5 to measure the Trimethyl-MEKK2 signal of each well.

Calculations:

First, the ratio for each well was determined by:

$\left( \frac{{Trimethyl}\mspace{14mu}{MEKK}\; 2\mspace{14mu} 800\mspace{14mu}{mm}\mspace{14mu}{value}}{{{flag}\mspace{14mu}{tagged}\mspace{14mu}{MEKK}\; 2\mspace{14mu} 700\mspace{14mu}{mm}\mspace{14mu}{value}}\;} \right)$

Each plate included fourteen control wells of DMSO only treatment (Minimum Inhibition) as well as fourteen control wells for maximum inhibition (Background). The average of the ratio values for each control type was calculated and used to determine the percent inhibition for each test well in the plate. Reference compound was serially diluted two-fold in DMSO for a total of nine test concentrations, beginning at 40 μM. Percent inhibition was calculated (below).

${{Percent}\mspace{14mu}{Inhibition}} = {100 - \left( {\left( \frac{\left( {{Individual}\mspace{14mu}{Test}\mspace{14mu}{Sample}\mspace{14mu}{Ratio}} \right) - \left( {{Background}{\mspace{11mu}\;}{Avg}\mspace{14mu}{Ratio}} \right)}{\left( {{Minimum}\mspace{14mu}{Inhibition}\mspace{14mu}{Ratio}} \right)\mspace{14mu}\left( {{Background}\mspace{14mu}{Average}{\mspace{11mu}\;}{Ratio}} \right)} \right)*100} \right)}$

Non-linear regression curves were generated to calculate the IC₅₀ and dose-response relationship using triplicate wells per concentration of compound.

SMYD3 cell assay data for representative Compounds of the Disclosure are presented in Table 1 in the column titled “SMYD3 Cell IC₅₀ (μM).”

Example 21 SMYD2 Biochemical Assay

General Materials

S-adenosylmethionine (SAM), S-adenosylhomocysteine (SAH), bicine, Tween20, dimethylsulfoxide (DMSO), bovine skin gelatin (BSG), and Tris(2-carboxyethyl)phosphine hydrochloride (TCEP) were purchased from Sigma-Aldrich at the highest level of purity possible. ³H-SAM was purchase from American Radiolabeled Chemicals with a specific activity of 80 Ci/mmol. 384-well streptavidin Flashplates were purchased from PerkinElmer.

Substrates

Peptide was synthesized with a N-terminal linker-affinity tag motif and a C-terminal amide cap by 21^(st) Century Biochemicals. The peptide was high high-performance liquid chromatography (HPLC) purified to greater than 95% purity and confirmed by liquid chromatography mass spectrometry (LC-MS). The sequence was ARTKQTARKSTGGKAPRKQLATKAARKSA(K-Biot)-amide. (SEQ ID No: 3)

Production of Recombinant SMYD2 Enzymes for Biochemical Enzyme Activity Assays

Full length SMYD2 (NP_064582.2) was cloned into a pFastbac-Htb-lic vector with an N-terminal His6 tag and FLAG tag, preceded by a TEV protease cleavage site. The protein was expressed in Sf9 insect cells. Cells were resuspended in lysis buffer (25 mM HEPES-NaOH, pH 7.5, 200 mM NaCl, 5% glycerol, and 5 mM β-ME) and lysed by sonication. The protein was purified by Ni-NTA (Qiagen), followed by TEV cleavage to remove the His6 tag, subtractive Ni-NTA (Qiagen), and gel filtration chromatography using an S200 column (GE Healthcare). Purified protein was stored in 20 mM Tris-HCl, pH 8.0, 100 mM NaCl, and 1 mM TCEP.

General Procedure for SMYD2 Enzyme Assays on Peptide Substrates

The assays were all performed in a buffer consisting of 20 mM Bicine (pH=7.6), 1 mM TCEP, 0.005% Bovine Skin Gelatin, and 0.002% Tween20, prepared on the day of use. Compounds in 100% DMSO (1 ul) were spotted into a polypropylene 384-well V-bottom plates (Greiner) using a Platemate Plus outfitted with a 384-channel head (Thermo Scientific). DMSO (1 ul) was added to Columns 11, 12, 23, 24, rows A-H for the maximum signal control and 1 ul of SAH, a known product and inhibitor of SMYD2, was added to columns 11, 12, 23, 24, rows I-P for the minimum signal control. A cocktail (40 ul) containing the SMYD2 enzyme was added by Multidrop Combi (Thermo-Fisher). The compounds were allowed to incubate with SMYD2 for 30 min at room temperature, then a cocktail (10 ul) containing ³H-SAM and peptide was added to initiate the reaction (final volume=51 ul). The final concentrations of the components were as follows: SMYD2 was 1.5 nM, ³H-SAM was 10 nM, and peptide was 60 nM, SAH in the minimum signal control wells was 1000 uM, and the DMSO concentration was 2%. The assays were stopped by the addition of non-radioactive SAM (10 ul) to a final concentration of 600 uM, which dilutes the ³H-SAM to a level where its incorporation into the peptide substrate is no longer detectable. 50 ul of the reaction in the 384-well polypropylene plate was then transferred to a 384-well Flashplate and the biotinylated peptides were allowed to bind to the streptavidin surface for at least 1 hour before being washed three times with 0.1% Tween20 in a Biotek ELx405 plate washer. The plates were then read in a PerkinElmer TopCount plate reader to measure the quantity of ³H-labeled peptide bound to the Flashplate surface, measured as disintegrations per minute (dpm) or alternatively, referred to as counts per minute (cpm).

% Inhibition Calculation

${\%\mspace{14mu}{ink}} = {100 - {\left( \frac{{dpm}_{cmpd} - {dpm}_{\min}}{{dpm}_{\max} - {dpm}_{\min}} \right) \times 100}}$

Where dpm=disintegrations per minute, cmpd=signal in assay well, and min and max are the respective minimum and maximum signal controls.

Four-Parameter IC50 Fit

${\%\mspace{14mu}{inhibition}} = {{Bottom} + \frac{{Top} - {Bottom}}{\left( {1 + \left( {{IC}_{50}/\lbrack I\rbrack} \right)^{{Hill}\mspace{14mu}{Coeffiicient}}} \right)}}$

Where top and bottom are the normally allowed to float, but may be fixed at 100 or 0 respectively in a 3-parameter fit. The Hill Coefficient normally allowed to float but may also be fixed at 1 in a 3-parameter fit. I is the compound concentration.

SMYD2 biochemical assay data for representative Compounds of the Disclosure are presented in Tables 2 and 3 in the column titled “SMYD2 Biochem IC₅₀ (μM).”

Having now fully described this invention, it will be understood by those of ordinary skill in the art that the same can be performed within a wide and equivalent range of conditions, formulations, and other parameters without affecting the scope of the invention or any embodiment thereof.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

All patents and publications cited herein are fully incorporated by reference herein in their entirety. 

What is claimed is:
 1. A compound having Formula I:

or a pharmaceutically acceptable salt or hydrate thereof, wherein: R¹ is selected from the group consisting of C₁₋₆ alkyl, C₁₋₄ alkenyl, C₁₋₄ haloalkyl, C₃₋₆ cycloalkyl, and hydroxyalkyl; R² is selected from the group consisting of hydrogen, halo, and carboxamido; A is optionally substituted 4- to 14-membered heterocyclenyl; with the provisos: a) when R¹ is ethyl, n-propyl, isopropyl, isobutyl, or cyclopropyl; and R² is hydrogen, then A is not optionally substituted, optionally bridged piperidinenyl; and b) when R¹ is C₁₋₆ alkyl or C₃₋₆ cycloalkyl; and R² is hydrogen, then A is not optionally substituted pyrrolidinenyl; X is selected from the group consisting of —S(═O)₂—, —S(═O)₂N(R⁷)—, —N(R⁷)S(═O)₂—, —S(═O)₂C(R⁸)(H)—, —C(═O)—, —C(═O)N(R⁷)—, —N(R⁷)C(═O)—, —C(═O)O—, —OC(═O)—, —C(═O)C(R⁸)(H)N(R⁷)—, —N(R⁷)C(═O)C(R⁸)(H)—, —C(R⁸)(H)C(═O)N(R⁷)—, —C(R⁸)(H)N(R⁷)C(═O)—, and —C(═O)C(R⁸)(H)—; or X is absent; Z is selected from the group consisting of hydrogen, optionally substituted C₁₋₆ alkyl, fluoroalkyl, hydroxyalkyl, amino, alkylamino, dialkylamino, heterocycloamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (cycloalkylamino)alkyl, (heterocyclo)alkyl, (cycloalkyl)alkyl, (amino)(hydroxy)alkyl, (amino)(aryl)alkyl, (amino)(heteroaryl)alkyl (hydroxy)(aryl)alkyl, (aralkylamino)alkyl, (hydroxyalkylamino)alkyl, alkoxyalkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted 5- to 14-membered heteroaryl optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl; wherein —X—Z is attached to any available carbon or nitrogen atom of A; R⁷ is selected from the group consisting of hydrogen and C₁₋₄ alkyl; and R⁸ is selected from the group consisting of hydrogen, C₁₋₄ alkyl, hydroxy, amino, alkylamino, dialkylamino, cycloalkylamino, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, and hydroxyalkyl.
 2. The compound of claim 1, or a pharmaceutically acceptable salt or hydrate thereof, having Formula VI:

wherein: R^(11a) and R^(11b) are each independently selected from the group consisting of hydrogen, C₁₋₄ alkyl, and alkoxycarbonyl; X is selected from the group consisting of —C(═O)—, —S(═O)₂—, and —C(═O)C(R⁸)(H)—; Z is selected from the group consisting of (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (amino)(aryl)alkyl, (aralkylamino)alkyl, (heterocyclo)alkyl, optionally substituted C₃₋₁₂ cycloalkyl, and aralkyl; and r is 0 or
 1. 3. The compound of claim 1, or a pharmaceutically acceptable salt or hydrate thereof, having Formula XVI:

wherein: R^(11c) and R^(11d) are each independently selected from the group consisting of hydrogen and C₁₋₄ alkyl; and X is selected from the group consisting of —C(═O)— and —S(═O)₂; or X is absent.
 4. The compound of claim 3, or a pharmaceutically acceptable salt or hydrate thereof, wherein: R^(11c) and R^(11d) are hydrogen; X is absent; Z is selected from the group consisting of hydrogen, optionally substituted C₁₋₆ alkyl, fluoroalkyl, hydroxyalkyl, (amino)alkyl, (alkylamino)alkyl, (dialkylamino)alkyl, (heterocyclo)alkyl, (cycloalkyl)alkyl, (hydroxy)(aryl)alkyl, alkoxyalkyl, optionally substituted C₆₋₁₄ aryl, optionally substituted 4- to 14-membered heterocyclo, optionally substituted 5- to 14-membered heteroaryl, optionally substituted C₃₋₁₂ cycloalkyl, aralkyl, and (heteroaryl)alkyl; and R² is hydrogen.
 5. The compound of claim 1, or a pharmaceutically acceptable salt or hydrate thereof, having Formula XVII:

wherein R″ is selected from the group consisting of aralkyl and (heteroaryl)alkyl.
 6. The compound of claim 1, or a pharmaceutically acceptable salt or hydrate thereof, wherein R¹ is selected from the group consisting of C₁₋₄ alkyl and C₃₋₆ cycloalkyl.
 7. The compound of claim 6, or a pharmaceutically acceptable salt or hydrate thereof, wherein R¹ is cyclopropyl.
 8. The compound of claim 1, or a pharmaceutically acceptable salt or hydrate thereof, selected from the group consisting of:


9. A pharmaceutical composition comprising the compound of claim 1, or a pharmaceutically acceptable salt or hydrate thereof, and a pharmaceutically acceptable carrier.
 10. A method of treating a patient comprising administering to the patient a therapeutically effective amount of the compound of claim 1, or a pharmaceutically acceptable salt or hydrate thereof, wherein the patient has breast cancer, bladder cancer, cervical cancer, colon cancer, kidney cancer, liver cancer, lung cancer, head and neck cancer, skin cancer, pancreatic cancer, ovarian cancer, esophageal cancer, prostate cancer, or leukemia. 